Jumping Off A Collapsing Bridge! | MythBusters | Season 8 Episode 28 | Full Episode

[@Ferodra]

In the age of "What the heck should i watch?", those uploads are a literal godsend. I remember, back in the day, whenever a localized episode of MB would be on TV. It always made the day much better

[@arthurmarques3598]

That's truth. Rather this to netflix

[@sirelobar1637]

That no Streamingdeanst take that series is unbelivebel..

[@KandiKlover]

Long as you use VPN outside the USA.

[@marcin_karwinski]

If I recall Richard Hammond hosted documentary on weather/water, hail is not a single block of ice. It's layers upon layers, and that gives it its strength... far higher than a ball/block of singular frozen piece of a similar size - if memory serves, his tests have shown that a ball of ice like shown in mythbusters breaks "easily" upon impact, while the hail formed in layers is far more impactful. Add to that the multiple hits from the hail potentially compromising integrity through the mix of concurrent and sequential blows potentially making it more impactful, before you account for any weight of accumulated ice chunks stored in the boat along with the gear attached to the shell of the boat...

[@simonhede4381]

you also see that the hail balls in the initial clips have these spurrs/protrusions, hitting with one or two of those is going to concentrate a ton more energy than the perfectly spherical and relatively fragile edge of the balls they used.

[@borntoclimb7116]

​@@simonhede4381 true

[@daniels-mo9ol]

You won't ever get harder ice than solid ice. Introduce layers of different densities you only make it more brittle. Layers will also absorb energy on impact not increase it. But as stated a pointy egde might increase the chance, you won't make ice harder though. If the sphere is already at the ice breaking point a smaller tip won't change anything.

[@flatterkatz]

in addition to this, I have never seen a hail storm where only a single hail falls. They really should have hit the same spot several times. Like.. 20 times.

[@LocalDiscordCatgirl]

Plus cushioning from the sabot, they should have done it from a longer range to let the sabot discard and measured impact velocity. Repeated hits over a prolonged period of time, not discounting pre-weakened sections. Those are variables that exist and will be encountered.

[@SyntheticFuture]

I like the idea that if where to go to that dry dock you can probably still find weird holes and weld marks from these episodes out there xD

[@araonthedrake4049]

The reason why it's impossible to jump on the tension bridge by listening to the explosion, is that both the sound you're hearing and the release of tension travel at the speed of sound. Not only that, but the speed of sound is faster in denser mediums, so the bridge actually loses tension faster than the sound of the explosion reaches whoever is on the bridge. Add to that human reaction time, and by the time you're trying to do something, you're already in free fall.

[@jbz4788]

Yeah you’d need to jump just before the thing snaps to even stand a chance of making it

[@amusik7]

The voice overs are so good. "In a cliffhanger myth thats high on drama and long on suspense.."

[@BurningTrapezoid]

They're just gonna ignore the fact that they were sometimes hitting the reinforcement of the wooden boat and sometimes the hull directly?

[@MYwinters1945]

"like a walrus on steroids " LOL

[@RedsKevin]

Yeah. That's offensive to the walrus.

[@gorgha3988]

One main problem I can see with the hail tests, is that hail is never round and perfectly symmetrical or smooth. It comes in all sorts of funky shapes, usually with very pointy ends and edges. It also doesn't have a thick cloth to cushion it lol. A real hail stone can be like a bullet, or a spear head. Which as we know both require much less force to penetrate objects than a round or flat object does.

[@tisucitisin1]

Whoever decided that MythBusters should be uploaded to KZbin should get a raise!

[@uselessDM]

If you thin about it, if hail is gonna take a boat down, it's probably one that is rusty or rotten.

[@pulsar22]

A hail storm is not just one hail. It is a rain of hail. So, I think a continuous barrage of hail at 90mph could punch a hole after sometime. Notice how a gust of wind may not topple a tree but a continuous storm with many gusts sometimes will.

[@gbulmer]

I agree they should have tested multiple hailstones impacting the same place. However, in the heavy or persistent hailstorms I've experienced, the first hailstones remain covering the ground (roofs, cars) for a while. So after a few 'layers' subsequent hailstones wouldn't hit the boat's hull, but they'd hit the covering of earlier hailstones. With hailstones 2 inch diameter (which they need to be to have high energy), a foot deep is less than 10 'layers'. I think, relatively quickly subsequent hailstones will expend much of their energy smashing into preceding hailstones. Plus the 'structure' of those hailstone layers will dissipate impact energy over a wider area. Best Wishes. ☮

[@MetalHeadReacts]

What they're failing to take into consideration with the Hail is the fact that hail doesn't just hit one individual place per ball, it's a relentless pounding of probably several hundred or even thousand pieces hitting the same spot over and over again, that could very easily weaken the structure. You hit the same spot on something over and over again for an hour or so, you would very likely break it. Nowhere in the myth did it say that just one individual ball of hail was responsible.

[@vinkuu]

My thought exactly. I don't know how glass fiber works, but for the wood boat at least it would be chipping away at the wood like an over sized sand blaster.

[@RedmarKerkhof]

That and the big waves that would be in a hailstorm. The boat would be rocking a lot, possibly scooping up water every wave. I wonder if they neglected to consult any sailor, or chose to conveniently ignore it for the sake of the science experiments. Probably the latter, come to think of it.

[@gbulmer]

@MetalHeadReacts I agree they should have fired multiple hailstones at the same spot. However, I disagree with your assumption _"it's a relentless pounding of probably several hundred or even thousand pieces hitting the same spot over and over again"._ In heavy or persistent hail, the 'first layers' of hailstones don't go away. They stay. Hailstones will build up and protect the bottom of the boat. After a few inches that fallen hail will protect the bottom of the boat, and diffuse the impact of subsequent hail. Fallen hail may even break when hit, dissipating even more energy. So the centre of the boat will likely get covered with hailstones first because it's the lowest. Nearest to the sides, bow and stern will take longer to cover, and so will be hit multiple times. However, they are only going to be hit repeatedly until the bottom of the boat is covered. It won't take a lot of 'layers' of hailstones to cover the bottom if it's baseball size hailstones. (If it's not baseball size hailstones, it probably doesn't have the energy to punch a hole.) So, fire multiple times at the same spot; maybe less than a dozen. Certainly not thousands or even hundreds because it'll build up and protect the boat's hull. There's no harm in firing at the same spot once it's covered in a couple of layers of hail for the sake of thoroughness, but I think it'll be rapidly diminishing returns after a few layers. The idea that it might be _"several hundred or even thousands" of pieces doesn't hold up with KGT's claim that the deepest recorded hail was 4 feet. Even assuming hailstones were smashing already fallen hail, one hundred 2 inch diameter hailstones is over 10 feet heigh (assuming they're reasonable spherical, and pack as tightly as possible, there are about 8½ hailstones/foot). Hopefully we can agree. by the time one foot of hailstones have covered the bottom of the boat, the impact of subsequent hailstones will be diffused over a much greater area, and hence will do much less damage than the first impacts. Best Wishes. ☮

[@iceman7975]

@ 29:59 had they aimed a bit higher and hit the ply instead of the keel timer which is way thicker than the ply they may have punched a hole through.

[@daniels-mo9ol]

Nah the second shot clearly hit the ply 50%, too little damage.

[@MegaPlayerXxX]

Honestly, after what I've seen hails do to our roof... I have zero doubts that hails can make a hole in a boat. Our tiles have clean ping pong sized holes in them. Now that I think about it, I think what they should've done is use smaller diameter. I know the myth said baseball-sized hails, but smaller hails at same speed might've achieved better penetration. Since the hails were so big, the impact was spread over bigger area. Then again, smaller hail has less kynetic energy. Maybe there's a sweetspot when hail has perfect diameter and enough speed to do maximum damage.

[@jarrodbright5231]

Yeah because when there is a hailstorm you only ever have one high speed hail stone. As someone who has lived through 2 massive hail storms that did massive property damage I can tell you that your car/boat/roof survives the first massive hailstone fine. It's about the 200th one that does it in.

[@Reptex_cs]

I have forgotten how much I love this show. Adam and Jamie were a big part of my youth❤

[@Hughes86]

I love Grant Imahara's reaction in 22:08. xD I miss him. :(

[@Isitbecauseimpanduh]

1 thing being missed, hail storms are accompanied with strong winds, which cause waves, weight of the hail and waves combined can cause capsizing.

[@borntoclimb7116]

The collapsing bridge is a nice cartoon running gag

[@sleepybunnynorbun1039]

tbh hail has been measured way bigger than what they are using and thats just what has been recoreded. Hail can prolly become way larger than the thing lightweight iceballs they are using.

[@jreverie7018]

I think your boat getting a hole from a massive piece of hail is the last of your worries if youre out on it. I'd be more worried about head trauma 😆

[@minooset]

so much work, glad you did this

[@narsil1984]

Good job for the due diligence on the hail / boat myth, I would say, it seems less of an extreme case than the end result make it seem. I dont know how likely the hail is to punch holes, their experiment makes it plausible that it can pierce but at the end of the day, there's a few more factors that would be in place. In a storm, the balls probably wouldnt fall vertically at those speeds but crucially, ALOT of impacts would happen. There'd be wind and the surface of the water would be choppy as heck. In their store experiment, they declared the shot at the wood boat a failure despite it clearly taking chunks of wood from the boat... if hundreds of hail balls hit it in a real life situation, that damage would add up. Also the impacts would make the boat rock in all directions in addition to the wind and waves creating chaotic motion too. So there'd be an ever increasing weight in the boat, maybe some damage to the structure but even without punching holes, the hail would melt over time and with the crazy motion and waves, sea water would come in more easily and the combination of all those factors would make it far more likely that the boat sinks. A crazy puncture could too ofc but just the strong motion, water from air and sea combo would do it I think.

[@gbulmer]

They should have fired multiple times, not once. However, I think I disagree with your assumption _"if hundreds of hail balls hit it in a real life situation, that damage would add up"._ In the heavy or persistent hailstorms I've experienced, the fist hailstones remain covering the ground for a while. So after a few 'layers' subsequent hailstones wouldn't hit the boat's hull, but it'd hit the covering of preceding hailstones. With hailstones 2 inch diameter (which they need to be to have high energy), a foot deep is less than 10 'layers'. I hope we can agree, relatively quickly subsequent hailstones will expend much of its energy smashing into preceding hailstones. Plus the 'structure' of those hailstone layers will dissipate impact energy over a wider area. They realised the timber of the first boat in the shop had rot, so they weren't extrapolating damage from that. Best Wishes. ☮

[@jarrodbright5231]

@@gbulmer My first hand observations from the Perth (Western Australia) hail storm of 2010 disagree with you. And no the insurance companies didn't try this sort of thing - the evidence was everywhere.

[@gbulmer]

​@@jarrodbright5231 Thank you for replying. So what aspect did your _"first hand observations from the Perth (Western Australia) hail storm of 2010 disagree"_ with? For example did the hail melt very rapidly, so it didn't protect surfaces it landed on? Or did later hail continue to damag,e eg. boat's hulls, through many layers of hail? Or something else? I don't doubt weather in Australia can differ from the UK, but I'd like some information about what you are disagreeing with. You wrote _"And no the insurance companies didn't try this sort of thing - the evidence was everywhere."_ who was that directed towards? It seems like a non sequitur. Did you mean to post it on some other comment? Best Wishes. ☮

[@jarrodbright5231]

@@gbulmer Multiple large hail strikes caused massive property damage including rendering dozens of boats un-seaworthy (i.e. it ruptured hulls). The hail did not form any protective layer. The second part was aimed at the OP rather than at you directly. Weather conditions in Australia and the UK are quite different as the antarctic currents and tropical currents interacting off Australia's coastline results in occasional super-cell storms off the WA and QLD coasts. This results in golfball to baseball sized hail (complete with nasty spikes on the hail stones). We get to observe this sort of thing first-hand more often than any other place in the world.

[@gbulmer]

@@jarrodbright5231 Thanks again for replying, and especially the extra explanation. I've never experienced anything like that weather. No hail bigger than roughly 1cm. However I've seen it on UK TV. There, the coverage is usually brief (a bit like TV footage in the episodes), and emphasises the size of each hailstone, and the devastating energy of the first few minutes. Damage does not seem to be from prolonged hailstorms, and hundreds of hits. I guess golf-ball size hail happens in the UK maybe several times every year, but is reported nationally far less often. It's only on national TV when their is tangible evidence in urban areas (usual car windscreens or car body damage), for the TV crew to record, and maybe hours after the storm has finished. So maybe only a few times per decade. The property damage is usually windows and car windscreens, and much less commonly dents in car bodies. Damage seems to happen in the first few moments, in the first few 'layers' of hail, and is not due to hundreds of hits in the same area. So, thanks for the extra information. I understand why windows, car windows and sloped roofs aren't protected by earlier hail. However, I still don't understand why hail doesn't build up on relatively horizontal surfaces. Is it so brief that the damage is done in the first few moments, so no layers are built up (as seems to be the case in the UK)? Or does big hail smash itself on impact and 'self destruct', or does subsequent hailstones have so much energy it smashes previous hailstones and itself, or does it melt away quickly, or something else? Any views? Thanks again. Best Wishes. ☮

[@lloydsumpter7735]

For hail sinking a boat by filling it, three things. First, add some weight to the boat, like an engine, fuel tanks, etc. The hull itself might not sink, but add a few hundred pounds of "stuff" and the boat might sink. Second, some boats have thru-hulls above the waterline but well below the gunwales - the hail would only have to sink the boat to those thruhulls. And third, if you put the hail at the SIDE of the boat rather than in the middle, it may list until it sinks.

[@LocalDiscordCatgirl]

For the hail myth, I feel like the cloth sabot is acting like the beanbag out of a riot shotgun - those have steel BBs inside, but dont tend to cause a significant wound because its wrapped in cloth. And keeping in mind that hail storms aren’t a single hailstone at a time, they come in a storm. Heavy, repeated hits for a prolonged period of time, across a large area. Discounting the rotten section of the wood boat irks me too, because to me that acts like a section that’s already taken repeated hits and been weakened or chipped. To me impact speed is absolutely a plausible way for a hailstorm to sink a boat.

[@MindestensDreiZeichen.]

Eh, if you are on a small boat without cover in a hailstorm of baseball sized hail, a sinking boat is the least of your problems. Thesr iceballs are deadly

[@Mazi_Kratos]

Can't a raindrop hit the same spot twice? Can't it be the same with hail? Like constant bashing by hail can eventually damage the boat...

[@klaus4040]

that's what I thought, material fatigue after multiple hits

[@gbulmer]

Yes, raindrops can hit the same spot repeatedly. However, hailstones don't behave like raindrops..In the heavy or persistent hailstorms I've experienced, the first hailstones remain covering the ground (roofs, cars) for a while. So after a few 'layers' subsequent hailstones wouldn't hit the boat's hull, but they'd hit the covering of earlier hailstones. With hailstones 2 inch diameter (which they need to be to have high energy), a foot deep is less than 10 'layers'. I hope we can agree, relatively quickly subsequent hailstones will expend much of their energy smashing into preceding hailstones. Plus the 'structure' of those hailstone layers will dissipate impact energy over a wider area. So, I agree multiple hailstones could hit close enough to the same spot repeatedly. So I think they should have fired multiple times at he same spot. However, those first hailstones will dissipate the impact of subsequent hailstones. So it will likely be diminishing returns once an area has a few 'layers' of hailstones. Best Wishes. ☮

[@TiagoFilipeCabral]

i'd expect a boat to get several hits in the same area in a hail storm, apparently they only get hit once

[@flatterkatz]

So professor, what is hail? Wait, it's balls of ice? Who would've thought!

[@rjspires]

The hail stones sinking a boat myth is one hell of a way for an insurance company to disprove a claim.

[@VonSchtauffe]

I have never seen jamie so afraid

[@falconwind00]

As well he should be. Never mind falling, that bridge is an entanglement risk. If one of those cables gets wrapped around a body part, he’s going to lose it. 1600 lbs is more than enough to break an arm or amputate a hand.

[@MadHax-wt5tl]

So don't do a cliff hanger, do a temple of doom. Well that's another piece of information I'll never use taking up room in my cerebral cortex.

[@DrakeAurum]

That last boat test was a real hail Mary.

[@_invencible_]

when i was a kid i used to watch mythbusters dubbed into spanish, i didn't know the original had so many puns

[@burningatthetrailhead]

So baseball sized hail can put a hole in a pitched roof but not a wooden boat?

[@j3tts0n65]

Epic ice cutting chainsaw montage was needed here 😂

[@tenrabbits3069]

22:59 Busted for the last time

[@Sethioz]

in my head i'm SCREAMING AT THEM cuz of the hail ball test. at 80mph they keep shooting it on the strut and not at the bottom!!! i think it would have cracked the wood at 80 if it didn't hit half the strut, those struts are like 2-3 times stronger than just the bottom! i can't believe they did not see it!

[@Danger_N00dle]

I like to think that multiple high speed impact of hail on a boat could potentially damage it, especially if it's made out of wood. While, it might not create holes, it might lead to cracks and leaks

[@tenrabbits3069]

19:57 Busted

[@snithfferx]

Hail size of a baseball... nah, now a days, we have soccer size hail... uh.. are we upgrade or downgrade?

[@WhinyWortex]

Honestly a part of me is disappointed they didn't put Buster into the boat as they filled it

[@gabrielv.4358]

The boat test was wrong because the boat in the water dissipates the ball mass and the cloth dissipated some mass also

[@Kleavers]

Why didn't they do a running start on the bridge? Have an actual athlete run down the bridge and jump as the explosion hits. Maybe the forward momentum helps?

[@WyldMooN00]

It's so ironic that ice would sink a boat, but then it floats on water

[@Oskar6875]

I have a question... Does hail really fall at the speed of the wind?

[@RB-bd5tz]

38:20 Bridge smashed; 46:12 Bridge intact. Did they really rebuild it, or are the tests shown out of order?

[@AWSVids]

Probably filmed out of order. Both of Jamie's drops were probably done while he was set up for them, and then they switched to Adam. Would have been more hassle to do Jamie, then get Adam set up, and then go back to having to set up Jamie again. But excitement-wise, Jamie's running grab for the handrails and subsequent attempt to climb was probably the one they wanted to end the episode with, rather than Adam just dropping and hanging there anti-climactically. But also, I think they probably did still have to do repairs to the bridge in between takes, because you can see some boards come off during Jamie's drops as well. With that handy staple gun, it probably wasn't too hard to just put them back on.

[@MunchYoutube]

Nice

[@robertcahoon5278]

The physics change???? 😯🤔🤔🤔😖

[@WilliamScavengerFish]

38:09 the temple of doom scenario then

[@colinofay7237]

Could be that in a real storm it could weaken the metal boat as theres many hail balls as it was being damaged but only slightly(small dent). Say there was hundreds or thousands of hail "attacking" the boat, could that damage a metal boat enough that eventually it might make a hole? Im unsure about fiberglass but id be interested in knowing

[@gbulmer]

I can agree they should have tested multiple hailstones impacting the same place. However, in the heavy or persistent hailstorms I've experienced, the first hailstones remain covering the ground (roofs, cars) for a while. So after a few 'layers' subsequent hailstones wouldn't hit the boat's hull, but they'd hit the covering of earlier hailstones. With hailstones 2 inch diameter (which they need to be to have high energy), a foot deep is less than 10 'layers'. I think, relatively quickly subsequent hailstones will expend much of their energy smashing into preceding hailstones. Plus the 'structure' of those hailstone layers will dissipate impact energy over a wider area. So there may be _" hundreds or thousands of hail "attacking" the boat"_ over it's whole area. However it's unlikely to be a dozen in one spot. Best Wishes. ☮

[@gabrielv.4358]

yes

[@AHomelesschannell]

F5 Hurricanes run at +225mph

[@MrButtonpresser]

Great show. Back before the plethora of cockamamie conspiracy theories turned many people off science.

[@colinofay7237]

This is already on youtube

[@Game_Lab_Germany]

there is no data about hail wiht 300 miles per hour or..... just non survive to tell the tale? :D

[@michaelmayhem350]

They should have used the rammstein song Spring for this one.

[@AHomelesschannell]

That is a bridge too far

[@wenzelkai9257]

Sadly research Team dont make good work Mith says can it? and not can it often? hail record is 20.3cm hail by normal faling to the ground it has max. 5580 Joule of energy the test was by 700

[@MR_ChainReactions]

after watching this i feel you failed to test the bridge properly under the correct circumstances your starting from stand still whereas in the movie he was sprinting from 1 end to the other creating other factors. when you run on a bridge you already have momentum and the bridge is acting differently creating waves as such and from already running the plant foot would ideally be already on the bridge as your about to jump. the hail theory would be a lot better testing it in water with hail conditions met so i dont think these myths are busted or plausible as the same conditions weren't met

[@lucasfavre1282]

nerd

[@_J.F_]

I appreciate the effort they put into testing the bridge myth but you don't have to be a rocket scientist to work out that the moment one end of the bridge is cut, you are basically hanging in free air and can run or jump all you like and will still not move anywhere but downwards.

[@Fakovnik]

bro this is a TV show.. they should just called it busted and roll the credits?

[@_J.F_]

@@Fakovnik You completely ignored the possibility of the producers selecting some better suited myths to test.

[@Fakovnik]

@@_J.F_ If I'm the producer I'm thinking putting a "walrus on streroids" on a falling bridge is pretty good idea.

[@KaidenLewis-wy4hd]

I don't even understand why people in the comments are arguing about the hail myth. They literally came to the conclusions that it's plausible. But yet somehow people are all up in arms as if they said it was busted. Still arguing even when the other side doesn't disagree with you, that's the internet in a nutshell, I guess.

[@onbedoeldekut1515]

(Without watching) Jumping off would do little, as both would still have 'fallen' the same distance. You would still hit the water and come to terms with a different kind of inertial dampening. The only thing I would do is allow the bridge to break the surface and only then attempt to get as far away from the rest of the destruction and falling debris/whipping cables as soon as humanly possible.

[@timseguine2]

I also haven't watched it. The center of gravity falls at the same rate regardless of whether you jump or not. So if you jump you can make the bridge "fall faster", but the force generated depends mostly on how fast you can make the bridge move downward with your kick off. And that's not really very fast. Also the bridge doesn't "know" it was cut until the sound wave from the cut reaches you. But that is definitely not enough time to take two steps.

[@markusfeddersen]

Hi

[@Yplonario]

helo :) enjoy mithbusty

[@MR7498]

Why was jamies talking at the start clearly filmed without adam present they must have really not liked each other

[@theboringplanet]

timestamp? and how would you know?

[@MetalHeadReacts]

They didn't dislike each other, they just weren't friends. They have respect for each other and worked together even before this. They just weren't social with each other. They've both said this millions of times.

[@Foxtrott_4]

They were together, its just the angle that made it look like that

[@Games_and_Music]

They do the same with Adam in his shot. They probably recorded the interaction twice, once to get their separate angles and again for the together shots. It's true that they weren't the best friends, but i don't think that it really got to the point where they would refuse to be in the same shot together.

[@victorious9746]

Help me

[@Games_and_Music]

Blink twice if you're being held against your will.