Molten Salt Explosion at 82,000 FPS - The Slow Mo Guys

Nothing like turning what is usually on my chips into a slow motion exploding liquid! Gav and Dan film a classic backyard scientist experiment at 82,000fps. Watch the original video here - • Pouring Molten salt in...
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Molten Salt Explosion at 82,000 FPS - The Slow Mo Guys

[@PierceArner]

Thank you for putting in the *_382 days later_* cut, 'cause it's nice to know that sometimes these videos take even more to put together than you'd expect. Cheer to the both of ya!

[@RoosterTease]

Very true, i think a lot of people me included forget how much preperation and effort goes into a 9 minute video sometimes

[@user-hf2zg2cv6v]

Quality over quantity.

[@emilpersidski]

Isn't it that they live in different areas so they film a boatload of videos in like a few weeks?

[@joshuagibson2520]

I know for a fact that at 20 min video can take 12 hours or more. Way more when dealing with the hi res filming and editing. Planning, research, gather materials, film, edit, upload, etc, etc, etc.

[@mrjnuts1]

one way to tell if time has passed. dans hands. is it banaged up? yep. some time has happened

[@AniMe-xj1qd]

As a firefighter I've learned that 1 litre litre of water turns in to 1700 litres of steam, that's why you do not wanna extinguish a chimney fire with water, but I've never seen it IRL in a chimney, so if you could make it happen please do, also love your content and hope you carry on and have a safe life you two

[@LowLifeDust]

upvote so the boys see this!

[@FabiVoltair]

Awesome idea

[@alphagt62]

When I was young, we heated with a wood stove. A roaring sound in the chimney told us the chimney was on fire! It sounded like a jet engine. My Dad threw an ice tray full of ice in the stove, and the steam rising put the fire out.

[@MadScientist267]

No idea why KZbin thinks they need to delete "the key is the rate the water is given to it" but they did... and here's the receipt.

[@Gaze73]

@@MadScientist267 And yet comments with phrases like "c h l d f c k n g" stay, ridiculous.

[@Quazi-moto]

Seeing the glass flex -- but the silicone seals hold firm -- gives me a whole new level of respect for aquariums.

[@NeilFoley]

I'm not certain the glass is flexing (much). I think it's also possible we're seeing refraction in the water due to overpressure waves from the explosion. I think this because the side walls don't seem to flex that much and also it's just kinda hard to imagine aquarium glass being able to do that. Could be wrong, but I think it's worth considering.

[@NeilFoley]

Nevermind, I take it back. It looks like reflections off the front side wall are warping. That's a surface wave! Holy cow, I can't believe it held.

[@Respectable_Username]

I've said it before and I'll say it again: _thank you_ for always including the safety steps in the video and not editing them out! Role modelling an explicit culture of safety first is just such good practice, especially with so many dangerous "life hacks" being spread about the modern interwebs ❤

[@RonJohn63]

The only thing you learn being timid is that you're timid. YOLO!!

[@Respectable_Username]

@@RonJohn63 Erm what? What's that got to do with anything?

[@BlackBanditXX]

This really was NOT done safely.

[@SolaireIntensifies]

I love these two goobers so much. I'm so glad their "two guys and a camera" dynamic hasn't changed since the old days. Love you guys!

[@evilferris]

Don't forget whoever is doing sound effects does a great job too.

[@SuperRatzefummel]

There is a great video about it. I think the same guy works with destin

[@zavtparticles6828]

​@@evilferris should be gavin

[@spinosaurusiii7027]

@@evilferris Pretty sure it's Gav himself, he did a video on it a while back on their second channel

[@TheMostCasualLurker]

@@evilferrisGav does the editing sooooooooo

[@Herculesbenchpress]

I feel like Dan got lucky that none of the second crucible that exploded went in his direction.

[@MancunianManxman]

We've really glossed over that haha I think a good point to stop for sure.

[@luisbaldas2118]

That was really dangerous!

[@spacehomer9269]

Basically a steam powered hand grenade

[@Amalgamotion]

@@spacehomer9269w/ molten salt covered shrapnel. Intense! They are the luckiest mofo’s

[@echalone]

yeah that looked scary

[@misha4422]

The power of water flashing to steam demonstrates how lava hitting ground water can be so explosive. Impressive to see this small scale demo.

[@Lizlodude]

4:35 "A year wiser?" _notes Dan's bandaged hand_

[@algirdasnausedas324]

-A year wiser? -Mhmhmhmhm :Meanwhile proceeds focusing on the bandaged arm

[@moos5221]

did we ever learn what happened? i remember he suddenly had that in one of the videos without explanation...

[@soulreapermagnum]

im a little curious about the story behind that.

[@zavtparticles6828]

I know some of these are out of order? I wonder if this as old as the Tony hawk skateboard incident

[@canadianmoth]

​@@moos5221skateboard

[@wildcaveman5310]

And drops the crucible with same clamp and in the same way

[@Eyerleth]

"What's the melting temperature of salt?" "I think it's like 800 or something." It's 801. VERY good, Dan.

[@Rogue_Trooper970]

How Dan still has all his limbs is an absolute miracle.

[@RealWendys]

"and remember if at any point you feel unsafe, just don't do it" - Gav. Amazing friend. :)

[@usmcboyd]

I love that you constantly look out for each other's safety. Escape paths, either person being able to call it off if they feel unsafe. That is a great testament to your professionalism and friendship.

[@jamesyoungquist6923]

And a good example for everyone watching that YOLO isn't the philosophy to follow

[@jlt131]

@@jamesyoungquist6923 YOLO here is more of a warning than a reason to risk things!

[@zport1853]

friendship may be understating it, but yeah.

[@AndyGneiss]

@@jlt131 Just like the "YOLO" song by The Lonely Island. It's a cautionary tale.

[@bladeprincess]

yeah

[@3400Modified]

"Trains used to be moved by steam" followed by ****hard thinking pause**** funniest statement all video. lol

[@EricJW]

It's funnier if you realize a ton of power is still delivered by steam today. Nuclear, natural gas, oil, and coal power plants all dump their energy into water which then goes through turbines to make electricity.

[@nomadMik]

It _was_ a good point, though. 🙂

[@nunyabisnass1141]

Trains were built to move steam.

[@Taima]

Lmao it was a brilliant statement. Immediately made it all make sense, and probably made Gav feel a little silly for ever doubting the power of steam explosions in hindsight. I know it did for me at least.

[@jepepe01]

and yet some subs are still powered by steam

[@auerbacher69]

i'v been watching your videos for over 10 years or so now and i just love how the basic dynamic between you two hasn't changed one bit. that's so. so. rare.

[@nilescox2900]

Have been watching for 10 years at least now. You guys still are amazing and I love that you both seem like the same great people that started this show.

[@davyman2000]

I never realized this before but Gavin looks like the substitute science teacher at the beginning of the day and Dan looks like the sub teacher at the end of the day

[@cleverusername9369]

I'm stoned too

[@davyman2000]

@@cleverusername9369 how did you know? ARE YOU A COP?!?!

[@keithflynn5651]

Super Chromatic Peril sensitive sunglasses! As soon as they detect danger, they go completely black and opaque, working on the principle of what you can't see won't hurt you. Really cool video as usual guys :)

[@AbenZin1]

Just what I was thinking!

[@maaaaaathew]

Dammit! I scrolled looking for this but didn’t find it until after I added it. Well played First 👏

[@NemoConsequentae]

@@maaaaaathew Me too! 😆

[@sheerluckholmes5468]

Long live Zaphod Beeblebrox

[@bythelee]

Nearly missed this, since I was looking for Joo Janta 200 Peril sensitive sunglasses. Douglas Adams had some crazy, yet amazingly insightful ideas. Don't forget to bring your towel. (Dan got wet).

[@eric7591]

The audio design never fails to impress me. Great job guys, excellent video!

[@JustinGreenBaxter]

I really appreciate the inclusion of the safety talks in these videos.

[@oilucky1]

*has a near death experience” Dan & Gav - “WOOOOOOAH”

[@Kumquat_Lord]

Ever since i saw the backyard scientist do this years ago I've needed to see your cameras get the uber slow mo

[@alex.g7317]

Ubercharge ready!

[@exwa1300]

@Kumquat lord Two of the videos I wanna see from the backyard scientist for the Slow Mo Guys to do are either Supersonic rubber band whip Or 400MPH Rocket Knife

[@Jessie91J]

I'm just kinda dissappointed that they didn't show us if the salt makes "figures" (like metal) in the water.

[@scottydu81]

Backyard Scientist, the original Florida Man!

[@MemesNick]

That's a collab I'd love to see!

[@koroxus]

The point around 6:35 when the additional explosion happens and for a split second looks like the tank of water lifts as a solid block before spilling over, is very cool

[@nw2kr8bc3t]

im actually surprised how much the commentary on the slow-mo shots have become, used to watch these and high school and coming back has made me appreciate the growth even on the new stuff, super cool!

[@knightshousegames]

Yeah, it's funny, when I watched these in college it was like "heh, we lit something on fire" and Dan was played as this like big dumb brute mostly just blowing up condoms on his head or whatever Now he's like, the smart one

[@paddycaker]

7:22 BRUH lmao that was so close on being a long hiatus for these two. Glad you're safe haha

[@dotkomist]

First off: adding this to the "YT compression nightmare" list. Second off: cannot believe how chill you guys were at the big red hot ceramic frag grenade you inadvertently created

[@TforTomm]

Dial it up to 4K and the increased bitrate makes it look much better even on a lower resolution display

[@Sabrinahuskydog]

It only looks bad because you're not watching it at 4K. Do that even if you're on 1080p screen always with all youtube videos.

[@thecrowcook]

Just a correction, crucibles are not ceramic, they are solid graphite

[@CommanderNoob]

Dan has that badass mechanic look whenever he puts the suit on.

[@ralanham76]

8:00 i love how the video is slowed down and the wave of water is going over the side of tank like it's not moving.

[@thebugmonster38]

Thanks for an awesome video as always but my god guys please apply a refractory cement to your furnace, those ceramic fibers are no joke for your health. Untreated kaowool can get lifted up with the furnace exhaust and can get into your lungs. I melt stuff for fun on the regular and was so concerned to see that. Love you guys though, keep on keeping on!

[@habib6863]

This is interestingly relevant to my job. I treat tungsten carbide in a molten chemical salt bath and those parts are then quenched in water. Awesome to see these slowmo shots!

[@connorkavanaugh]

Really, genuinely, extremely glad Dan lived through this one, because for a second there, it really looked like he wouldn't!

[@MicheleRussell-d2f]

I love how you always look out for one another's safety. pathways of escape, with the ability to be canceled by anyone who feels insecure. That says a lot about your teamwork and professionalism.

[@cmoor7928]

I remember when Dan used to be the expendable stunt volunteer, and now he's the a well informed, educated opinion, expert! you've come a long way bro. Been a fan for years

[@burgerbait]

I just want to say that this channel never fails to remind me that there's 4k and then there's 4k. The image quality of the videos on this channel is insane. I wish all 4k videos looked like the ones these guys put out.

[@Soggyhead1]

Got a little nervous with how close Dan's hand was with those "year later" ones, especially with the explosive crucible. Rooting for no injuries from you buddy, and phenomenal slow mo!

[@Taima]

Hey guys, y'all prolly won't see this but Gav I just wanted to say as a guy who normally -hates- when fake sound is added to videos (especially old war footage, but I digress) - you are a master of making logical sound choices that definitely enhance the experience rather than taking one out of it. It's nice to not get irritated by something so major as sound yet so minor as slow mo/added sound. I know it ain't easy (but I bet it is a helluva lot easier than it used to be with all these years of practice!) Love ya guys.

[@pargatsinghlives]

Appreciate y'all going back to finish this so long after the first attempt. Also maybe get some sort of additional protection for your propane setup. Esp when you accidentally create frag grenades. Great video! Stay safe!

[@sealdoggydog]

"Better pop down the ol' shops" was comedic genius, even though you didn't realise it at the time!

[@rafis117]

Love how we can see why all large scale power is "steam with extra steps". It's not the only way you could generate power; some space probes and remote lighthouses directly use radioactive heat in RTGs because it's lower maintenance. But the same water-steam expansion cycle that makes these videos so spectacular is part of what makes steam turbines so effective.

[@alataadvenavod]

I do love how you are always ask whether is everything OK and is there the emergency escape way.

[@westminsterabbey.6916]

It’s nice to hear safety Gavin looking out for Dan :)

[@LDP..]

8:07 if you pay close attention you can see the shockwave traveling from the explosion through the droplets !! Just happy you were not injured man !

[@skar02]

Man I love sitting down with my little sweet treat and finding that there's a new slow mo guys video to enjoy

[@TnT_F0X]

5:20 1/10th of a second on Dan's mind. I didn't think It'd end like this... adding salt to an aquarium.

[@Mikeyman6488]

Might be boring for you guys at this point, but have you ever looked at the non-Newtonian properties of really wet sand being tossed in the air under slo-mo?

[@moos5221]

Explain in one sentence please what I'd expect to see when that happens.

[@ThaneCrosoft]

@@moos5221wet sand being thrown in the air. Give or take.

[@MichaelK_]

@@moos5221it’s actually really fascinating. Try it next time you’re at the beach. It’s quite hard to put into words but you can see the sand go from a hard lump to something very fluid-like.

[@moos5221]

@@MichaelK_ ok gotcha.

[@mike-kg2op]

@moos5221 their other non newtonian fluid videos are basicly just as simple but very nice to watch

[@Frankestein01nl]

At 3:48 you can actually see the crucible getting torpedo'd downwards, breaking the glass vertically.

[@yoirulethegreat]

-A year wiser? -mmmmmmm 2 minutes later..... proceeds to play Russian roulette with a salt frag grenade

[@101Phase]

ok in all seriousness that final attempt with the crucible exploding really could've injured Dan

[@glich6035]

Their usually pretty good safety wise. Dont know why people always seem to underestimate the danger of molten salt.

[@nalgene247]

Probably not. He wore the proper safety gear. Edit: Y'all acting like it's a frag grenade filled with napalm. Those graphite shards aren't sharp enough or moving fast enough to penetrate the suit. Any that do come in contact will be in contact only briefly.

[@colinscutt5104]

he was pre injured, for safety?

[@samuelgarrod8327]

If he's not worried it's pretty pathetic for people who don't know him to be pussays.

[@glich6035]

@@samuelgarrod8327 go on wriggle your stubs harder and just keep puffing out your chest. Someone will notice the tears eventually big man, maybe even give half a second of their life to laugh.

[@CrowSkeleton]

Glad to know that both times filming Gav made extra sure than Dan wasn't going to get his skin melted off - it'd be easy to get caught up in the excitement and then in the explosion there. cool to see molten salt!

[@ArosIrwin]

I like that you guys are still doing this. Feels comfortable. And I like that you're finding new stuff to film each time.

[@Meta-Drew]

Watched a lot of your videos over the years but this one is particularly amazing

[@PicklesTheOtt]

I have a small request/suggestion for future videos. Just to give a sense of timescale, put a bar at the bottom of the screen representing 1 second so we can see just how slow it moves when you hit 80000 FPS.

[@moos5221]

That was dangerous! Please stay safe, I need the sudden exitement every few months when you upload a new video!

[@jimmccloskey3601]

Love these guys. They're like a classic rock band now for me - always looking forward to whatever they do, would so cool to see them when they're old but still doing their thang

[@WonderKat55]

I appreciate you guys being chill.

[@sp00-EKy]

I bet Dan was _real_ *salty* about this one

[@Wheelofthyme1010]

lol

[@carbonwolf3865]

I.... take the upvote

[@TelepathicWeasel]

i will always appreciate the amount of times gav checks if dan is okay in videos like this, if its something a lil more dangerous than normal its always; "are you alright b". its just so pure

[@Rathbone_fan_account]

I love how Dan is always the one doing dangerous things and getting hurt lol.

[@1traviswyrick]

you guys do the best stuff! you rock!!!

[@GreenFillwood]

Now that's interesting. The welding helmet auto darkens when it detects ultra violet. When water cavitates it releases ultra violet. Does that mean that causing the water to boil rapidly with the salt also means it emits ultra violet? Would be interesting to use a lens/camera that detects UV and redo. Hmmmm. Great video and greetings from Essex. Phil.

[@samuelgarrod8327]

It reflects ultra violet light, it doesn't produce it.

[@Solais1019]

Cavitation can be a high energy situation, some shrimp click their claws fast enough that the cavitation bubble is briefly hotter than the sun's surface. I wouldn't be surprised if there's a photonic event from that rapid event with the salt​@@samuelgarrod8327

[@nirmaljacob3968]

Sonoluminescence produces light.

[@_-Nyx-_]

Summer has officially begun. The kings have posted.

[@SirPerfectful]

You only got 2 more months of summer left

[@The_Slavstralian]

the pulsing of the glass is wild

[@nevdoggz]

Having Dan wear a heart rate monitor while he does the dangerous stuff might be a cool to see

[@GenericaQwerty]

Oooh yes! And Gav too haha

[@brendaneichler5244]

Listen, the important thing here is that I can add Dan to the list of "KZbinrs I enjoy who also play Magic"

[@613Lawnjockey]

Petition to have him as a guest for LRR or one of the other big name groups?

[@brendaneichler5244]

@@613Lawnjockey Yeah, if I had a nickle for every time a famous KZbin duo had a member named Dan and one of them plays Magic, I would have two nickles, but it's weird that it's happened twice

[@aahhsplat]

Add in ' Action Labs' - enthusiastic lunacy ....

[@if_A_Nerd_Had_A_God_Complex]

Backyard Scientist and Slow Mo Guys crossover

[@OhYeah10100]

Dan got his crazy explosive-scientist hair out for this one. Dedication.

[@mtbgreg]

This is probably the best slow mo vid I've seen, insane. The pour at the 8min mark where the crucible falls in, just wow, we're already watching in slow mo and then it has to be slower again to watch the crucible explode. Amazing!

[@zohex.]

8:08 the drops slowing down and the crucible fragments go so much faster reminds of Gav's shot from a game of shadows... so cool

[@lexay4233]

4:35 "A year wiser?" -hand wrapped in bandages Yeah I don't think so

[@danieljensen2626]

You know it's dangerous when Gavin tells Dan he doesn't have to do it if he's not comfortable

[@InTheMindOfDavid]

That reaction happens so insanely fast. Specifically when the second crucible exploded. The cameras barely slowed that down at all. Even at 85,000fps, the explosion was still instantaneous! Bet the same volume but of pure molten sodium in water would be an insanely more intense explosion.

[@PupSentinel]

"I think there's graphite on the ground." Love your videos been watching for a long time and always get super excited when I see a new Slo Mo Guys video pop up on my notifications!

[@lwxflowxwl]

Please don’t quit ever I love the slow mo action

[@matthijs3134]

There's something so fascinating about things exploding in slow motion

[@tgrigsby7]

It's amazing how powerful and yet beautiful these videos are.

[@Zander2212]

Dan plays Magic? Awesome!

[@Desmozilla]

I love how nonchalant Dan is even after basically having a granade exploding right in front of him

[@KeithCooper-Albuquerque]

Excellent! I'm so glad you are both safety-conscious!

[@CamoGuy76239]

You're super slow motion videos give me so much more of an appreciation for the laws of physics that I literally can't look at the world I live in the same way ever again, and I'm grateful for this point of view! ☺️

[@Captain_Yata]

The "You're not in Hell yet" felt like foreshadowing for Dan quickly ascending to another plane on the second attempt

[@Rilintar-live]

Dan, I appreciate that you keep your robe, for history of all your adventures, but I think that repairing it (replacing a sleeve) would be better, than eventually throwing it out.

[@zavtparticles6828]

I think this is dans like 3rd jacket? The others should be in the care of fans

[@GenericaQwerty]

​@@zavtparticles6828This one is his original jacket 😊 he wears new ones on KZbin original shows and their TV show, but this one is the OG!

[@GenericaQwerty]

​@@zavtparticles6828this one is his original! 😊 He wears new ones in Planet Slow Mo/their TV show etc, but this is the OG.

[@GenericaQwerty]

This is his OG one 😊 He wears a new one on their other stuff, but this is the one from way back at the beginning. Edit: I can't elaborate on what their "other stuff" is because when I do, my comment gets autodeleted haha 🤷🏻‍♀️

[@slackolantern]

The last bit, with the red chunks moving while the water looked like it was literally sitting still was incredible

[@Maszys]

Thank you for these videos. My jaw dropped when when the crucible exploded like a frag grenade

[@aimfar7946]

Here before 0:05 never happens

[@jackielinde7568]

"Looks like I'm in Hell." Um... Aren't you guys in Texas? I mean, aren't they one of the contender states for the title of, "Second Place to Hell?" I mean, I know this because I live in Arizona, another state in contention for the title.

[@lolbenneh]

as a viewer coming back, I love that you guys still have the support that you did. this is just amazing :)

[@nombreapellido9038]

✅ Red hot frag grenade. ✅ standing well in the “splash zone”. ✅ left brain at home. Checking all the boxes gents.

[@Tee-ina-Skee-Mask]

id love to have a beer with these guys

[@moos5221]

wasn't there a thing when you saw dan with or without a certain t-shirt he'd have to buy you a beer? something long time ago...

[@jhvorlicky]

See how long a beer lasts in super slow mo

[@TheMw2freak]

Ayyooo good to see these two lads!

[@neonzombies8816]

You guys have been a crucial piece of my childhood

[@Nairozet]

The reaction is so violent, it would be easy to believe that you layer two different videos on top of each other.

[@MrMurkosullivan]

Seeing that 2nd crucible exploding on impact might have been the most dagnerous thing I have seen Dan do. I feel like you guys maybe didn't quite consider all the possibiliies with this one.. Stay safe Lads.

[@micahphilson]

5:06 So they're like the Peril-Sensitive Sunglasses from the Hitchhiker's Guide to the Galaxy. The moment the glasses sense danger, they go full black so you can't see it and be scared!

[@YtseFrobozz]

I feel like the Leidenfrost effect is why you don't get that crazy steam expansion right away.

[@sebbes333]

3:09 That's 82'000 Fames per second... and there are STILL *MOTION BLUR!!!!* 🤯

[@2011killjoy]

actually insane having the propane tank right next to where you're pouring the molten salt and expecting a sort of explosion

[@andyman8630]

why? plenty of gun vids have shown propane tanks shot and punctured with no explosion - only the rapid release of gas

[@jurekmonk]

Every time I come to watch your video, I never get disappointed, thank you very much guys for your creativity

[@interstellarsurfer]

8:15 When the mistake produces more interesting results than the experiment.

[@pencilpauli9442]

Blimey got notified so fast that it needed the slow mo guys to slow it down so I could see it!

[@thisnthat3530]

5:15 Peril sensitive sunglasses!

[@mmo5366]

Always worth watching your vids! ❤