Don't Put Wet Rocks In A Campfire

Join the science discord! / discord Ever heard of rocks exploding in a campfire? Can it really happen, and how dangerous is it? What happens if you spill molten metal on concrete? Today we will look at how and why concrete and rocks spall during a fire.
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[@TheBackyardScientist]

Have you ever had a rock explode in the fire? Story time - comment below! Don't forget to 👍👍👍 the video, it really helps! and it makes me feel happy 😄 Instagram - instagram.com/backyardscientistlofficial/ Twitter - twitter.com/ChemicalKevy Facebook - facebook.com/TheBackyardScientistOfficial/

[@Eray2007]

No but your channel is amazing keep it up! 🤸‍♂️

[@kaneyt0]

TheBackyardScientist Kevin, please respond to me! I’ve been with your channel since 200 subscribers!

[@chumby6556]

Kevin I love you channel I live in Florida to and love your expieriments

[@Marcel204_]

2020 be like : rocks can explode now

[@Eray2007]

@@kaneyt0 it says you joined KZbin 3 years ago...

[@aidangeist3106]

"Florida man turns concrete into a frag grenade in his backyard"

[@aizazrehman5153]

@@mizorogitsumugich9723 more like floristians lol

[@gustinoXYZ]

No! its "Landmine"

[@rvr-garage]

420th like

[@cozmo4452]

So true

[@michaelpalacio5]

“Local man creates shaped explosive charge out of concrete and molten aluminum”

[@Crow.Author]

You’re really adding value to the house, by the time you move someone with be able to set up an aluminium mine.

[@kalaniwaters7]

Clan Wren Storyteller haha

[@brockwilson2659]

True

[@yeetasouroushamburger840]

Yup

[@helloperson9445]

Man buys house for 500 thousand and find 3.8 million dollars in aluminum

[@alexblackburn8200]

Will

[@Fish_nipples1998]

1:54 "after about 8 minutes cooking on the fire we got our first crack rock." Spoken like a true Florida man.

[@ewanjones5591]

Here in Wales, the ground is wet almost all year round, especially in wooded areas. Once when I was out camping with friends, we had a rather large rock explode into 3 pieces, which actually sent some embers at us. we later found a hole in a camping chair that was nearer the fire, and we could only guess is was a rock shard.

[@pcblah]

After a few friends threw live ammunition into a campfire, we discovered most of our camp chair holes were from burning embers rather than shrapnel.

[@ewanjones5591]

@@pcblah Yeah, that was our first thought but it was more torn than burnt.

[@Arctic_1975]

My first thought is it's not a rock per se it was probably a geode they have liquid inside sometimes if not fully formed those would most likely explode.

[@ChrisG1392]

"after about 8 minutes of the rocks cooking in the fire we got our first crack rock" - Florida Man

[@Zooted32]

😂😂😂👌

[@armouredraptor9610]

Chris G. C R A C *sniff*

[@CutoffFern]

I get it now

[@lameplayr]

*e e t*

[@herbsmanherbs]

Don't say 'crack', Jez, please. Not now. Because when you say 'crack', it makes me think of crack, and... I really love crack. So can you not say 'crack' ?

[@MrSmith-ty4bg]

You know, as a kid, my grandpa always told me “never use river rocks for a camp fire, you might just lose an eye.” I never really understood why, but it all makes sense now.

[@terrafirma5327]

Yup. If the water turns to steam (mainly in sedimentary rocks) they can explode quite violently. A simple temperature differential won't cause an explosion, that merely cracks it. So you need porosity.

[@spinneborstel]

yah...it's not funny when the splinters start shooting around the fire lol :D

[@testicle-sama7501]

Did you lose an eye before learning

[@SilverScaleMA]

Flint is really bad at splintering, like tiny little arrow heads...

[@kaneyt0]

Mr. Smith 420th like.

[@kid_missive]

Yes. Had a campfire rock go bang next to a fire. It was on the West Coast Trail in British Columbia, and our fire was right next to the ocean where we were camped, and with a very large boulder. It was kind of scary. Then we threw our magnesium bars into the fire, which lit up the whole cove we were camped in. It was a memorable night for a kid. The end.

[@OakleyDokaly]

where the hell did you find a magnesium bar in a cove

[@avokka]

from the magnesium bush duh @@OakleyDokaly

[@tymz-r-achangin]

Absolutely. Ask my friend who used sand stone to put around the fire and his wife ended up going to the emergency room to get the grit removed from her eyes and several stitches on her arm.

[@ericmiltner3604]

Imagine having to cut this dude's grass and hitting concrete and metal everywhere.

[@jaredcarcamo8515]

I was just thinking about that...

[@GoldenTNT]

He has to cut it with scissors

[@kakomakothebuilder6584]

🤣🤣🤕

[@rosehirstius]

I would like but it's at a good number

[@lizgilbes6200]

Thebackyardscientist: can rocks explode Me, an intellectual: pOp rOckS

[@mohammedzarkout4135]

COMEDY GOLD

[@Cryseris]

Hehe

[@firdospratama4413]

Friend : What music genre do you like? Me :

[@Moron_extraordinaire]

Ba dum tiss

[@anggikharisma6388]

Dad jokes INTENSIFIES

[@jamespike5161]

I’ve had more danger from bits of exploding log going everywhere than bits of rock, but I live in the Southwest so wet rocks aren’t super easy to come by; bits of dry brush that are waiting for a stray spark, however, are every five feet.

[@bokane1963]

I live near a stony beach and have definitely witnessed rocks popping in fires. Slightly off topic whilst remaining somewhat on topic though the story that haunts me most was a friend telling me about a guy he knew that decided to cook an unopened tin of sardines on a bonfire which exploded red hot shrapnel into his eye. I had to mention this as it's all I could think about during this video

[@off-gridoutbackaustralia]

I've also seen a tin of baked beans explode in a fire always open the can first lol

[@smw8471]

You know it's dangerous when the Backyard Scientist is hiding behind a tree.

[@smw8471]

@waffeltek 2016 called. It wants 70% of it's vocabulary back.

[@ethanbecerra8708]

hoodamask lol

[@JixNull]

Dog total safe

[@MadeFromPixels]

I'm starting to think you should invest in a blast shield.

[@therealmarcher]

You can customize it with a banner

[@nyssfairchild2244]

Yeah, definitely.

[@Will-fs7oz]

Not at a funeral

[@alexanderartaza2173]

@Ben yes you can protect urself from ghosts

[@jahmarcelestin6621]

@Ben yes bro

[@rustyroyden5548]

have observed this phenomena up close and personal many times. porous sedimentary rocks and layered metamorphic rocks are quite prone to cracking and spalling sometimes quite violently. The fragments never reach a dangerous velocity but getting hit in the eye could be serious. Such rocks that have spent a lot of time submerged in water can be VERY violent with much larger cracking and spalling events. The real danger is the fire itself being ejected from the firepit onto the people near it and into flammable vegetation or materials nearby. On a couple of occasions I have had the entire contents of a firepit ejected by large spalls off of rocks buried in sand below a firepit.

[@moghosh7451]

Yes! Exploding rocks are a thing and lemons/limes as well! Pretty crazy stuff. I was camping in Utah and we used dried river rocks to make a fire pit. About a half hour or so went by before two explosions went off. It was one of the scariest moments of my life because of how peaceful it was before and it was very unexpected.

[@icarlyIV]

Visitor: *Screams* Was that a gunshot!? Guy who lives nextdoor: No thats just that one dude burning his yard again.

[@davidphillips6398]

You forgot it's florida

[@derekbauer2125]

@@davidphillips6398 hahahaha

[@GazelleFangs]

he looks like the word greg

[@DigitalHandle]

@@davidphillips6398 hmmmmmmmmmmm

[@The_Slavstralian]

They must be awesome people.

[@bobthebuilder1360]

"We got our first crack rock" ahhh yes the local Florida man with his rocks

[@nealramsey4439]

That's usually heard in a different setting huh?

[@uncertainfate9564]

Neal Ramsey hmmmmmmmmmmmm

[@l0l0mgwtgdq]

I found out this same thing happens with wood. When dumping water on a wood fire to put it out, do it slowly… I poured a 5 gallon bucket water on a standard camp fire and the whole thing blew up into splinters covering me head to toe in scalding water

[@LivingTheDream21]

I'd be interested in reading the description when you sell your house, and what you'll put down in the disclosure 😀 Great house 4 bed 3 bath, tons of space, may or may not find various metals and glasses from explosions. Swimming pool had lava dropped into it, and the other normal backyard scientist stuff.

[@olegyurchenko4127]

Totally underrated))

[@mybrother1350]

1:55 “After about 8 minutes of our rocks cooking in the fire we have our first crack rock”

[@PrestigeRoadman]

looool

[@SkyyGlass]

xD

[@Gurbatron]

ＵｎＧａ ＢｕＮｇＡ

[@DraconicMaker]

My brother *nice*

[@thefmaster9833]

Poor choice of words

[@brianartillery]

How about, for a laugh, making concrete with a good amount of Thermite mixed into it? The 'best' exploding rock, is Flint, by the way, with the added joy of when it explodes, it throws out glass-like shards of hot stone. If you really want an injury, heat stones to red hot - then chuck water, as cold as you can get it on them. Then call the hospital.

[@mr.x8259]

Or gunpowder.

[@aniu420]

Thanks for the advice :)

[@redsquirrelftw]

Actually another fun thing to try might be to put a bunch of rebar in the middle and then wrap a loop of electrical wiring (or just more rebar) with two ends sticking out. Apply a high frequency high current to it to heat up the rebar from the inside. Wonder if the expansion would make it explode.

[@thomasbrushweed8347]

Better yet, mix in obsidian. It is the sharpest material on earth and fun to make stabby instruments with.

[@xenonram]

Thermite would not do anything mixed into concrete. You could never get it to react.

[@HrRezpatex]

If you get a Baryte crystal, you can simply put it under warm water from the spring, and it will explode. Because of the tight molecule structure, for the same reason it is pretty heavy too. This has made many mineral collectors sad, as they come home with this and try to wash them in warm water.. lol

[@LittleTankDestroyaz]

Honestly this can be pretty dangerous, we had a concrete ring around a fireplace once and it exploded without any warning, there was a 4-5kg piece that flew about 50m past my dad nearly hitting him. Im sure if that concrete slab did hit my dad, he would be no more. :(

[@zoeygraceg]

At boyscout camp, we had a rock blow up. Sitting around the fire listening to scout master Jim tell stories a rock blew up. Scared me alot, so i slept in Jims tent. Long story short, im getting a settlement of $50k

[@johnrollex680]

That got dark fast man.

[@stacyswiss307]

Damn dude 😂

[@PlayboyJester]

They had us in the first half, not gonna lie

[@michaelreed1241]

😂😂 too soon bro

[@Mr-Ad-196]

Wait what the frick happened in that tent?

[@thaatsriight]

“And remember folks... safety third!”

[@ashQUA]

Lmao

[@jonathonlichtl928]

Lmao

[@jonathonlichtl928]

@@ashQUA lamao

[@ashQUA]

@@jonathonlichtl928 Lmao

[@ashQUA]

@@jonathonlichtl928 just kiss me fool

[@doglegjake6788]

Thanks for sharing a great video!

[@theshovster8505]

I recently had several “river biscuits” explode camping at the river, we made a fire pit out of rocks fresh out of the river, and was amazed at how loud they were!, sounded as loud as a gun being fired but really didn’t have a lot of force behind the explosions, although they throw a few pieces maybe 6 feet away, I noticed they split in layers instead of in chunks.

[@nigbigger4019]

Grandpa : **Camping with his son in the jungle** Campfire rocks : **Explode** Grandpa : **I Ain't no fortunate son**

[@garethbaus5471]

I get the reference you were trying to make, but you didn't quite set up the scenario well enough for it to be a good joke.

[@missingno2401]

grandpa: *theyre here*

[@commienaut]

Clicc Clacc it’s fortunate one

[@toastybread8100]

Me : **bullies the science nerd** The science nerd: **pulls out rocks and a blowtorch**

[@cratermaker3842]

If he only brought out one of the two, no biggie

[@thecourier6fnv]

Haha

[@tevoo1257]

Lmao

[@1SimonTheKid]

nerd:(screaming) *FRAG OUT*

[@Mickocarbomb]

Science nerd: *_"Rock grenade funny, ha ha"_*

[@michelewilliams930]

I used to use a jet torch to texture different stone tops. The spalling gives different finishes for different stone!!! Pretty cool stuff.

[@bootyslayaa3964]

Cool to see you nerding out

[@stalespaghetti]

Dog: chillin Rocks: *explodes* Dog: ight imma head out.

[@farahrathore3135]

Underrated af

[@ryleebrannon7546]

i laughed

[@dylanmcshane9976]

isnt this joke older than weve been alive? crazy how its still used.

[@discount_hoxton8852]

Timestamp?

[@juvnchy]

Woah you watched the video too??

[@Brandonscode]

Iv had a “dry” rock pop and fly 40 feet and smash a windscreen. Wasn’t a fun ride back from camp.

[@summergallagher3893]

I had a rock in a fire pop, it hit my thumb and I almost instantly got a second-degree burn.

[@wireknight]

@@summergallagher3893 why second degree burn and not a third or one degree burn

[@Synikoss]

@@wireknight First-degree burns are considered mild compared to other burns. They result in pain and reddening of the epidermis (outer layer of the skin). Second-degree burns (partial thickness burns) affect the epidermis and the dermis (lower layer of skin). They cause pain, redness, swelling, and blistering. Third-degree burns (full thickness burns) go through the dermis and affect deeper tissues. They result in white or blackened, charred skin that may be numb.

[@JackyDacky]

Wire ”Why did u get a blister But not a black bone hand

[@faisalbakes5880]

Whaaaat

[@haxguy0]

We used a flat stones to cook on once. When it exploded it was like a war zone. It shot our cooking pan like 30ft into the air. The rock pieces that were falling from the sky were exploding mid air and when they were hitting the ground. My friend almost had a rock piece hit his eye. Luckily we were all unharmed, but it was the most surreal things that ever happened to me.

[@lostinthewoods3662]

Could you imagine living with this guy, you’d be asleep at 7 o’clock in the morning and then all the sudden you hear a bang and then other bang and then there is aluminum shrapnel flying at your window

[@Shadow-sq2yj]

Take cover!

[@lostinthewoods3662]

Lol

[@ecanlas4932]

Shrapne- *screams of pain intensifies*

[@relentless_shotgun8207]

"how did you die?" "well, i took a shot for my beloved wife and saved her life" "i died in a plane crash, i didn't even get to finish my last wishes" "and what about you?" "i got hit by a concrete grenade"

[@v1ntge55]

XD

[@UncoolDean]

I know this is an old video of yours. But I think you should revisit it with rocks called Moqui Marbles. I know they are found here in Utah and I’ve personally been injured by them exploding in the campfire. I believe they explode so violently because they have are a soft sandstone surrounded by a hardened sandstone, allowing a ton of pressure to build.

[@DreadEnder]

I had a perfect campfire but has a large flat slate block underneath. I was busy building a small table, I turned around and there was a massive explosion of sparks and my granny fell off her chair! It was amazing and I still remember it years later

[@TrueMegaManiac]

"Florida man creates IED's in his backyard out of rocks"

[@euralsmith734]

TrueMegaManiac underrated comment remember me when you are at 1k likes

[@shrimppretzel4671]

when camping, me, my brother, and my cousin would take river rocks and put them in the direct center of the campfire with all the coals, and then take them out with tongs and dunk them in a red solo cup full of water. it's a miracle we aren't dead

[@kraken3793]

Why?

[@shrimppretzel4671]

@@kraken3793 to see if they'd explode lol

[@conman1395]

Except all you did was heat them up and then put them in water to cool them down...

[@alexplaysminc.-.5922]

You are one reverse step away from possibly rock grenades lmao

[@Emrirwastaken]

they dont really explode, but they kinda crack or dissolve in the water from my experience

[@James-fe7wd]

@TheBackyardScientist I once had some fun with some flurospar I retrieved from a mine (calcium fluoride), at night, when thrown to the fire, it glows a deep beautiful blue before exploding with some gusto, firing glowing blue shards all over the place place. You gotta try it!

[@fireheartrex1356]

i was camping in Nevada and there's this bolder we use to be where the fire is and the bolder kept exploding, and it wasn't to loud but it scared the crap out of me.

[@ihateshi]

Rock: *explodes* Dog: "we still be vibing"

[@gioalexigamingthebigboi]

YA

[@geyotepilkington2892]

I feel bad for whoever metal detects your "old homestead" in 100-200 years

[@owenwenoo3336]

Yah

[@armouredraptor9610]

Geyote Pilkington BEEEEEEEEEEEEEEEEEEEEEEEP

[@devastation3395]

Or who has to mow his yard

[@geyotepilkington2892]

@@devastation3395 its just aluminum, wont do too much damage

[@armouredraptor9610]

Geyote Pilkington yes but no bc that aluminium will jam the blades

[@kylekelly8711]

At my old job as a diesel technician we were replacing a trailer leaf spring equalizer. This required cutting a large 1" diameter bolt with an oxy acetylene torch. After cutting, a large chuck of the bolt landed on the concrete floor still glowing orange hot. Didn't think much of it but after about 1 minute a 1 inch square section of the floor exploded hitting me with pieces of concrete shrapnel. I could only assume there was an air bubble in the floor that expanded from the heat of the bolt.

[@dreamoutloud2629]

I'm 30 years old and grew up camping my whole life. I have thrown so many rocks into the fire pit over my lifetime and only ONCE experinced a rock explosion. I was in Idaho on a camping trip with some buddies and we were just hanging around the fire late at night talking when out of NOWHERE a random stone that was already in the firepit when we got there exploded and set off a mini stone confetti that hit a handful of us on the head and face but thankfully not in the eyes. It was insane at the time... it's cool to see him share the science behind it.

[@ecinhepler8557]

"We got our first crack rock.... I mean rock crack" hahahaa had me done in

[@thenamelessdemigod]

Ayyyeeooo

[@jahmarcelestin6621]

ayyyy yo thats true

[@shelleybrisson5563]

Poopy

[@Iwearcrocs223]

ocal man make thermite in his backyard

[@blazeberryz3240]

florida man creates crack from rocks

[@christianking9356]

Can you imagine late night scary stories by the camp fire and there’s a f***ing mini explosion?

[@williamlastname]

"and the killer killed a man and stole his gun. he hides in the woods an- BANG BANG BANG

[@rustyrecoil2719]

"and the killer roa-" -bang- "roams vietnam style i suppose"

[@emm_arr]

I had late night chat around a campfire when a rick split. We all started! Pretty loud!

[@killman369547]

And that's why you use dry rocks to make your campfire perimeter. How do you know if a rock is dry on the inside? You don't really but it's a good bet that rocks that have been under the sun all day are probably dry inside.

[@Andre_Thomasson]

mrballen has a story about a campfire on an old bomb that exploded seriously injuring a group

[@johngrund2567]

We have a campfire in front of our house. . . used to have it going several times / week. I only remember one rock exploding. We used several types of rocks & I don’t know what type it was, but the explosion was loud. I’ve also had one pop off on a camping trip. . . and that one shattered enough to send some chips flying; took a nick to the shin, but it was barely enough to break the surface of the skin. . . no serious injury.

[@doug7677]

We had a few rocks explode when we were tossing raked leaves in since a few rocks got raked up along with the leaves. I had a little stone whiz by me but I was more worried about the embers it scattered everywhere when it popped

[@MattH-wg7ou]

"Concrete and rebar have about the same expansion rate" yep, which is one of the reasons they're used together.

[@kriger992]

Yes

[@quantum.code.x]

Yes

[@wparkerunc]

Yes

[@fireandcopper]

Actually back at away camp when a friend and I were like 13 we put river stones in a fire and shrapnel would sting your face

[@feliksssander1554]

I always did this. Always had fun, would run around the fire and tried not to get hit. Never got too harmed, just minor welts.

[@neonnixie6024]

One time me and my friends were camping in Death Valley, and we built a fire using a pine board we found, we didn’t realize that the pine board was coated in tar till it started burning, for 6 hours, and to make a long story short the rocks in Death Valley to pop like crazy even if they are dry. One rock popped So violently it hit me in the chest while I was standing 8 feet away.

[@addanametocontinue]

"Vietnam going off..." "They're in the trees!!!!"

[@jemman2906]

I met the Lorax, he speaks for the trees, and for some reason the trees speak f*cking Vietnamese.

[@_KennethG]

Congs: we've been made

[@psychologicaltirefire8190]

@@jemman2906 I've met Santa, for some reason he says the snow speaks Finnish.

[@glitchlaboratorys6116]

Leon Trotsky when I talked to him the snow was speaking Russian

[@JesusChrist-yh4pi]

*Fortunate Son intensifies*

[@msp2896]

3:49 reacts like an NPC just witnessed a crime 😂

[@ML-do5ii]

Facts!

[@ObeseT]

This made me laugh so hard

[@actually_a_sign3954]

That scream too! 😂

[@rylenstuffsv2]

Such reaction speed

[@Dontlookification]

I once arranged some rocks in a circular formation and placed a grill on top in order to cook. The stones didn’t look wet but we were at a swimming quarry so it’s possible they had moisture inside. While I was stoking the fire one of them exploded with enough force that if I had been hit I bet some of the sharp pieces could have drawn blood. Definitely made me jump. I imagine the stone I used was sand stone.

[@XxQuader764xX]

I had Dwayne the rock Johnson hit me in the face when I was sitting around a campfire

[@BelowAverageGamingYT]

I had Dwayne Johnson explode on my face

[@kitkat5565]

C.C

[@brandonlee8123]

Lucky...

[@Traubnwe]

@@BelowAverageGamingYT wait a second, sounds kinda sus!

[@pinkfedoras]

Za Warudo. I know right? 😂

[@michealscott9279]

One time I was sitting at a fire that was sitting on concrete about an hour later the ground under it exploded and before seeing this video I did not know why but now there is a big crater in my friends drive way

[@Silver5kull]

how wide and how deep

[@michealscott9279]

James Sisco not to deep but at least 2 feet wide

[@corruptedcalculator703]

How many people experienced it?

[@Ayden488]

Why would you have a fire on a driveway?

[@michealscott9279]

@@Ayden488 well we’re else are u supposed to put it in a fire place

[@Lord_Baphomet_]

When I was on a camping trip with my JROTC group and we used river rocks as a makeshift stove top with a fire underneath. I thought the can had exploded but it was the rock. It shot hot beans all over my friends and they had to be treated for burns and our trip was called short. They literally thought we had fireworks and we would’ve been kicked out but all of our stories matched and one of them went off when someone dumped water on the fire.

[@colinmartin9797]

I've accidentially had a chunk of my garage floor explode while heating some copper with a map torch. It did not take much heating, either. Blew a chunk about the size of a quarter a couple feet

[@brashair7652]

NEVER pour a concrete floor in a fire pit! I mistakenly did, and even though I put in a drain pipe for draining off rainwater, I hadn't considered all the sand underneath the concrete that was still able to absorb ground-water that was naturally there. Weeks later I started my first campfire in it, and it was quite large being as it was a 4 foot wide fire-pit. About 30 minutes later there was a horrendous KABOOM and flaming firewood and chunks of concrete shot up out of the pit at least 30 feet in the air! Luckily no one was sitting around the fire pit at that moment, but it scared the sh*t out of all of us there.

[@MrTmpr2050]

Was it fully cured?

[@Scotty-vs4lf]

@@MrTmpr2050 he said it was weeks later so probably, but i know nothing about concrete

[@gregrohsful]

Any cement that you build a fire on will explode. Its well documented and would have been easy to look up. They make specific mixes for contact with fire. Its stored right next to the cement you bought.

[@c0nct3d]

A similar story happend to me, I once put a piece of concrete drain pipe in a fire, and a few hours later it exploded and a piece of croncrete hit one of my friend right below the eye, quite scary.

[@deskmat9874]

Assasination

[@Thorkell6969]

Now that "Florida" tag is testament of crazy content

[@aidanclopp5193]

Facts my dude

[@tmbottegal]

There we are.

[@jasonvines2892]

I set a camp fire on big rock outcropping next to a creek once. It popped from underneath big enough for logs to roll.

[@robertbalaicius9260]

always entertaining, thanks...!

[@____j____a____c____k6466]

Pinecones also explode when they are put in a fire for long enough.

[@crimsonthemudwing]

Usually that is also how the pine cones distribute seeds. the seeds are inside the pine cone, then once it pops open then the seeds can plant new trees.

[@joeydr1497]

😏

[@alphaevade5292]

What turn it into a drag grenade

[@randomdudeak2778]

Good to know... gooood to know.

[@Mackin3]

I’ll keep that stored in my brain for later

[@edensolomon23]

Surprised you didn’t add the “welcome to another episode of don’t try this at home,” at the starting lol

[@Noname-qu2wg]

I was camping with a few friends and I brought some rocks I grabbed from a nearby creek to make a ring. After we made our makeshift camp fire, we lit it on fire. We kept the fire going for an hour or so. As we were talking about how calm the woods were, the rocks began exploding. Out of pure instinct we jumped off our sitting spots layer flat on the ground and covered our heads. When we realized it was the rocks that had exploded we put out the campfire with our water… and some pee. My friend got hit on his arm and we took a rag and wrapped it around the wound cause. It wasn’t that bad but being teenagers that got scared shitless, he did what we thought was needed. It bled only a little but everyone was fine

[@werewolf74]

One time I was camping and I had a fire under an overhang. Those rocks had water in them and hissed and popped and dropped slabs. It was scary. it was not the size really it was that the rocks then explode in the fire, throwing embers. The rock themselves are probably not that bad (unless dropping on you from an overhang) also, if they surrounded the fire it would be a very hit fire flinging rocks.

[@xylogie277]

Gamers: "I'm popping off right now!" Wet Rocks: Hold my beer

[@entropic7768]

Hold my aluminum*

[@TheJackHoustonShow]

We had “smart” friend put river rocks below our campfire to create a platform (even though we told him not to). Let me emphasize that these were RIVER rocks, as in taken directly out of a river that they were probably in for thousands of years. The rest of the night was spent avoiding shrapnel that was flying 20-30 feet away.

[@MPireXX5L]

😂😂

[@NatureShy]

LMAO

[@gereniccc4487]

you ok

[@gereniccc4487]

you ok/ was any one hurt

[@Pinkskydude1234]

Thanks bud great examples I was telling someone they explode and showed them this instead

[@marcel1372]

the other day we had a sewer campfire with an old pallet that must've gotten soaked because a bunch of wood started exploding sparks everywhere it was actually kinda dangerous but probably infinitely better than exploding rocks

[@akramisalah8189]

What is a sewer fire?

[@marcel1372]

@@akramisalah8189 posted up in this concrete tunnel by local creek . the kind u can walk upright in. it opens at both ends but once my bro stupidly lit an old xmas tree on fire in there and it created like an instant fire jet backdraft situation lol

[@TheWolfsfang1]

@Backyardscientist I randomly got a notification for this video, and thought it was odd I've not seen much in a while. It makes sense you might need a break, no worries. But I checked to see if my notifications were on, nope. That bell was "unrwrung". So I guess KZbin has been messing with notification settings again. 🙄 Hope you guys are well, I hope you and the whole KZbin crazy science guys get some videos out. As you're ready. I just don't watch podcasts. 🤷‍♂️😆

[@willemtrainor8507]

Alternate universe where it didn’t rain: “Florida Man sets half of state on fire from making explosive concrete

[@paytonwright3943]

You mean southern Florida

[@papabonito310]

Well no rain = no water = no wet rocks = less boomy

[@willemtrainor8507]

the real banana man facts tho

[@millerkiller6496]

the real banana man Is this why people say “Fight fire with fire”?

[@TruthXisXChaos]

“We got our first crack rock” A phrase used ever so often in Florida

[@Sp00kq]

I have a friend who can confirm that. He said his area is filled with crackhead and hillbillies

[@jayd6083]

Was once camping on a Rocky beach in Arkasas. A friend carelessly tossed a rock in the fire without me knowing, 5 minutes later and it was like a grenade went off, throwing shrapnel and hot coals everywhere! Melted the tent and sleeping bags

[@jesseburton4997]

Yes I've had it happen to me, my cousin too. 2 different times. Flint rock and or river gravel containing Flint rock and fire do not mix lol.

[@stevenkendzierski9333]

Imagine living next to him... "Honey there's a hole in the roof agian."

[@flarecorey6615]

@Dangamer35 i thienke yu spielleid again wroenge

[@vexminister3691]

@Dangamer35 edited yet still wrong

[@thecoolaxolotlnova8523]

Hey babe? The crazy man's outside again, lock the doors and get to the basement.

[@florianellerbrock8922]

Mooooom to the basement the strange guy next door has build some strange things again

[@residentstar]

Yes

[@vegasrockafeller3518]

An electrical wire fell in front of my house, causing a small fire. The fire was so hot that the curb exploded, sending concrete up to 60ft away.

[@dakhaikh]

Vegas Rockafeller wth Final Destination much?

[@kydatyvegrybatokeanvisoko2420]

Oh yes, just happened as we were camping recently Had a gas fire pit cuz we got fire bans goin on rn and figured putting a bigger rock in would radiate heat better The one that was chosen (early in the morning, before i was outta the tent yet) to put on wasnt all the way dry ig and i was startled by a loud pop followed by what sounded like someone throwing gravel at the tent

[@carcasscruncher9354]

While camping in a secluded gravel parking lot we had a fire ring. Sometimes the ends of burning sticks and logs would fall out of the ring. We had a shovel to scoop them up and put them back in the ring. Sometimes gravel would get thrown in with these scoops. It didnt take long and some of them would explode. Sounded a little less loud than a 22 rim fire shell going off. I deduced it was the gravel. So I threw a few in and sure enough they would explode. I guess this is why you dont use river rock around a fire, the water absorbed makes them explode. The gravel would catch dew and rain and I'm pretty sure that's why they would explode. Interesting stuff.

[@joeydr1497]

I was tending a fire with my friends and we had used flat river rocks to stop the grass burning The rocks burst almost in half and shot embers in a 3 meter radius I have a scar on my shin from kneeling on one we didn’t find

[@nfg_fpv]

When I was younger with a few mates we had a bonfire on a concrete pad and the concrete started popping and throwing little bits of concrete everywhere even chipping a car window

[@imaginewagon8177]

no one cares

[@ceke]

Imagine Wagon 55 people do..

[@soverxigniv8850]

Imagine Wagon 82 people do..

[@oof2218]

@@imaginewagon8177 stfu

[@kevinsammut7246]

Concrete can indeed explode, and with a surprising amount of force. A friend of mine once lit a fire on a side walk we were about to demolish (it was cold, and we had a long wait for something) and after a few minutes it exploded like a grenade. A 10 pound chunk of concrete flew past my head, with debris at least 60 feet away from the explosion.

[@wedge471]

Can confirm from personal experience River rocks to explode. Wild camping had the bright idea to build a pillar in the middle of the creek and set a little fire on top of it. One of the rocks exploded and flew a good half-dozen feet. Luckily no one was hurt

[@southerndraw8215]

Had a concrete floor start “popping” while cutting I beams. From the slag landing in big puddles and the oxy/acetylene torch flame touching it.

[@SilverScaleMA]

I have had rocks explode on me before, the most dangerous was a flint rock that had been in a river. It became shrapnel and and at least three of the tiny shards hit me in the face and gave me tiny cauterized cuts where they hit. Took forever for them to heal and I had scars that took several years to fade. I did a bit more research and found out that both flint and slate are notorious for exploding into shards. It is mostly because of the way they layer and makes it easy for moisture to be trapped inside and expand in all the layers. It is far more dangerous with them if they are saturated though as I learned the hard way...

[@SilverScaleMA]

@Kody Choates you get hit in the face by the equivalent of scalding hot peices of glass half the size of your fingernail and moving at a very high velocity. If one had hit me in the eye rather than on the cheek and forehead I very well could have been blinded by it. I actually didn't cry when it happened and really didn't realize just how bad it was because they didn't bleed and I had no mirror. But I had rather obvious red welts that surrounded the actual burnt and cut skin for several weeks and the cuts themselves itched forever while they healed. They didn't even really hurt until several days later. I had also got hit in the arm too by a larger peice that did bleed and hurt quite a bit but I just put a bandaid on it and that was it. Didn't even know I had the others till I got home and looked in the bathroom mirror.

[@kibukun]

Anf this is where he earned the name, Captain Flint.

[@jblitty4320]

one time i was cooking chicken on a flat rock (possibly slate) in a camp fire and me and my friend were starting at it as we were a foot a way and the whole thing blew up in out face and the ash went everywhere

[@BenjaminEsposti]

Any type of rock can "explode" like this, and there are three causes related to external heating/cooling: 1. Expansion/boiling of water in cracks/fractures or porous surfaces. 2. Localized thermal expansion/contraction, like putting a drop of water on a hot incandescent light bulb. 3. If lava contacts water, the water can not only flash to steam, but also be separated into hydrogen and oxygen... you know the rest, lol.

[@SniperScav]

Same happened to me

[@tomriddolls5301]

I want that last piece as a serving tray for dips at parties!!

[@mwoodall13]

I found the comments you made while researching this video while I was also going down this rabbit hole

[@jonnywilson8436]

“They can explode like GRENADES, let’s put it to the test”. Me “yeah last time I checked grenades and flesh don’t work well”😂

[@randomcat9314]

note to self: throw overheated rocks at the enemy and have a chance for then to explode in their face

[@professorjiggles1793]

This is what is called a *CHANCE GRENADE* has a 40% chance of dealing 100 damage, and a 60% chance of dealing 0. Also deals splash damage.

[@CounterMS]

I use the rocks as a molotov. Pour oil on the rocks and heat it up. Then attach a lighter that's still turned on then throw it. Done, you just crafted a molotov

[@daltonjames2705]

Your shirts are always awesome

[@davidhaas3111]

Yeah, in Boy Scouts we always looked for rocks with striations because we assumed the strips were different types of rocks that would expand at different rates(whether this is true, idk) Beut anyways, we would bring them back to camp and put them in the fire along with loose change. The rocks always exploded and we liked to see if the coins were still hot in the morning. They often were. There were a few minor cuts from exploding rocks, but never anything serious and usually just on our shins.

[@thehistoryhuntermudlarks7650]

It was like 1 am and something hit me and burned a clean hole through my trouser leg, I told my friends but they denied it until the fire properly started exploding. There was like a pop every 10 seconds and it was throwing hot shards of rock at us. Thank you for this video, it’s a life saver 😭

[@gereniccc4487]

are you ok/ were you hurt at the time

[@sexhaver2165]

@@gereniccc4487 nah bro he died

[@gereniccc4487]

@@sexhaver2165 a dont htink he died he culd of been or who ever were talking aboat culd have been injerd tho

[@fractal5764]

@@gereniccc4487 good spelling

[@gereniccc4487]

@@fractal5764 ik i spell bad

[@theunknown7879]

I never had this problem in life, it feels like you introduced me to new physical problems I need to worry about.

[@nicolagupta8303]

Yes I have experienced this phenomenon in my backyard

[@grogthegorillafrog]

Flint really like to do that and that's why bigger nodules you gotta spall cause there is high chance of cracks usually cause my ice so water is usually trapped inside.

[@refererererer]

My experience was when I was around 6 and we were playing near a dump site where trash was burned. We decided to throw rocks into the fire and they exploded. They produced loud bangs. We did it repeatedly to make sure that it was really the rocks/stones that were exploding. We threw relatively smooth stones that were laying around to be used as ground fillers.