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What you're about to see could be downright dangerous. So a word of advice leave the myth busting to us

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On this episode of myth busters

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With good reason we spent ten years telling you to not try this at home

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But in this episode we've compiled a bunch of things that we think you might be able to try at home

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Like this

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Well not exactly like that, but after 200 episodes of saying don't try this at home

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The myth busters are apparently changing their tune

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To deliver a DIY science special

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Your results may vary so prepare your safety glasses

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your pocket protectors

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And your clipboard

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Because for this episode they're finding myths you can maybe try at home or maybe not

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Who are the myth busters?

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Adam Savage

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And Jamie Heineman

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Between them more than 30 years of special effects experience

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Together with Carrie Byron

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Tori Balachy

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And grant him a horror

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They don't just tell the myths they put them to the test

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Okay

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So the do try this at home special exactly our lawyers are actually okay with this they are but here's the thrust of this episode

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We are gonna be testing a bunch of zany

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Experiments and viral videos and assessing one whether or not they're true, but two whether or not they're actually okay to try at home

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So some of this may be actually too dangerous to try yes

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The first one though, I think is gonna be pretty easy to try at home, and it's a classic

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Microwaved water. Yeah, micro waved water will kill plants if you water them with it

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I don't think it's true at all, and I think we should test it

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It's an internet myth that has spread worldwide

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Supposedly these pictures are evidence that water boiled in a microwave is toxic to plants

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But could that be true or is this myth in hot water?

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Well, if it turns out you can try this at home, you'll need the following

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And down in the shop Adam's green thumb is prepping his test of the waters

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So the question we're gonna answer is does microwave boiled water kill plants?

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Very nice to determine that we're going to expose some plants to microwave boiled water, of course beautiful

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We're also gonna compare that to some other controls one will be water boiled on the stove

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One will be just regular tap water one will be no water at all and now for the supposedly toxic ingredient the microwave boiled water

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Obviously to conduct this experiment you're gonna need a bunch of water that's been boiled in a microwave

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Bombarded by those evil microwaves put it in

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Push the button start there we go run it for five minutes a full power seat that works

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There we go. All right now as a point of clarity

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I want to point out the myth isn't that plants don't like boiling water for gosh sakes

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Don't pour boiling water on your plants. You'll kill them immediately like most other living things now

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Let this water cool down to room temperature

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Before using it on a living thing

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Well with his three types of H2O inside the rig he's ready to get his thumbs green

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There we go

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We've used eight romaine lettuce in four groups and we're subjecting those four groups to four

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distinctly different conditions of water now that water is coming from these buckets up here through these water timers and they're all

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Set to water the plants for exactly the same amount of time and exactly the same amount of water every single day

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But wait you say what about sunlight? Ah, we thought of that

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That's the light these are actual grow lights

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We're gonna subject our plants to these grow lights for about 16 hours a day a really nice

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Vibrant sunlight and we'll log their growth on this chart here after a week. I swear we should see a difference after a couple of weeks

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I think this test is gonna be pretty definitive

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But as exciting as it is to watch lettuce grow, let's fast forward one week into the future

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All right, let's see how everyone's been doing

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Look at that

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9.25

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Boiled water is outgrowing everything else. It was around five and a half inches and now it's over nine inches tall right now

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It's not looking very good for some math

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So after two weeks of growth Adam is let loose amongst the lettuce for the last time

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What we wanted to determine was whether microwave water was dangerous and I think definitively we proved that it's not look at this

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This is the healthiest plant in here both of these they're higher than any of the others and they got the microwave boiled water

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They're totally fine. Oh, and we also determined that no water is really really crappy for plants

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So note that you brown thumbs it may be busted, but don't take our word for it. Try this at home

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You

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Next up some emergency firefighting

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All right, so first step is a viral video the fans want to know if it's possible and if they can try it at home check it out

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With a runabout ablaze it's jet boat to the rescue fighting fire with speed

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Oh

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But in a crisis could an extreme 180 really extinguish a fire

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Dude that is awesome, but you know there's something a little fishy about that video

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It does look like there could be some kind of visual effects going on there

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We need to find out if this thing is repeatable. Yay. Let's go boating

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Motorboating you'll see you

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So to find out if this works over at big break marina they're recreating all the elements of this emergency situation

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So the boat we're gonna be using to put out the fire is this it's a 1978 charger jet boat

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It's got a 350 Osmobile engine come aboard matey. All right safety first my friend safety first

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Not only that but it shoots a rooster tail up to 120 feet

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We should be able to put out the fire with this. I wish we had dork your life preservers

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Sorry, man. These are the dorkiest ones we could possibly find. What are you talking about?

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They match the boat there in this season's color of safety

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And the best part is they're letting me drive

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Except the owner has one stipulation he wants to be on the boat with us

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Which doesn't make any sense because this is probably the most dangerous place you can be I think we need to practice

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Driving

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Precision driving is key to this myth so first Tori needs to get the boat up to speed

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Then just before he crashes into the pylon pull off that 180 turn

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So that the boat sends up that dousing rooster tail

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That was amazing practice, but I think it's time to light a fire

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Yeah, I think you got it man

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The second element of this emergency is the flaming boat and for that they're taking precautions. Oh, hey

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So this fine watercraft is our fire boat

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We're going to set a bale of hay and a pallet on fire and let it burn

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You got the air underneath so that it can light all those hay and actually get a good burn

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This thing should flame up nicely now if things go well

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We'll be able to put it out using the boat and if not the fire department is on hand to put it out

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Time to set the fire

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But before we do that we're going to wet down all of the lands right behind where the boat's gonna be

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We don't want any stray embers to cause any unnecessary fire

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The boat is now set to go up just like the video

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Great some vacation carry, but will the speed boats rooster tail quench the blaze

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All right boats tide

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Tori's all ready to go. We got to do set the fire now

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Yeah, let's do this. No, I'm not gonna lie. I am a little nervous. I mean this isn't my boat

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All right proceed with lighting the fire

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We're gonna be flying at 50 miles an hour straight towards a flaming boat

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And at the last minute I need to crank on the wheel so that I don't crash into the boat, but spray water onto it

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All right boys. We have a raging fire bring it on in and no no that

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I'm gonna have Grant and the owner of the boat in the boat with me. So if I crash, I'm not just hurting myself

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I'm hurting two other people. I'm scared

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Just so I understand what we're doing we're heading straight towards a flaming boat, right exactly

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Okay, and then the last minute we're gonna turn out. I hope this works

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After 10 years of impossible dangerous and downright crazy myths that you shouldn't

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Or couldn't try at home

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This episode is all about finding things maybe you can

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So next Adam and Jamie get into a rhythm with one two five

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216 metronomes

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Well that escalated quickly, but how did they end up here?

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There are a bunch of videos out there that show these things getting into sync if you let them run for a while

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Come on guys get with it

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It all looks so easy online

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Although they start out syncopated these metronomes eventually tick over into a synchronized symphony

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But can you make metronomes dance to the same beat at home?

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There is one thing that I keep noticing in all the videos of the metronome syncing up and it is that they always seem to be

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Sitting on a platform that moves slightly that's got a little shake or shimmy to it. Let me show you why I think that's important

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If I move this metronome while it's ticking

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Even small movements have a significant effect on the periodicity of its ticking

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I've got a couple of soda cans. This is my platform with shimmy

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Got a metronome, and I just want to see what happens when I put one on here

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You see it

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It's totally moving

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This is very cool

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This little metronome is definitely having an appreciable effect on my platform

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And I think it'll have even more of an effect if the platforms lighter, and I've got just the thing

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All right, this is working great

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It's definitely having more of an appreciable effect because I got a nice bearing surface platform light aluminum pipes and a very light platform

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For it to sit on I'm taking away as much friction and momentum as I can so that only the metronome is having the effect now

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Let's try to

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Adam doubles his trouble with two metronomes set to the same tick mark look at the movement on this platform

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And after two minutes the shimmy takes over

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Stay with it boys

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It just took them a little while to find each other's rhythm

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So if two will sink will five march to the beat this pink one is messing with my

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Mellow here well three minutes in and something has come unsung this pink one is way out of phase with the other four

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The other four seem to want to get into phase with each other, but the pink one's not playing along nicely

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Why can't you get along like your brothers?

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All right, here we go. Let's try

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Amazingly it seems that Adam has tickled the pink just the right amount there it is okay

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We got to work it

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Yep, they're in sync that's awesome, okay

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Everyone be quiet everyone be quiet stop stop stop

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All right, let me explain what happened here

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This pink one was not playing well with the others and I noticed when I was watching it that it was just

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Consistently a little too slow so in the theory that the manufacturing tolerances on these metronomes are loose I

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Sped it up by dropping it a tiny amount below its lowest tick mark

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Which is what all the others are set at and that turned out to be the magic bullet that helped this all get in sync

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That's awesome to know these are tunable

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And now that he's got his tickers tweaked just how many can he make dance to his tune?

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Got it. I can't fit any more on here

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I

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Love it

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It's really kind of amazing

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They they go way out of sync and they come back in this thing and eventually they find this and if one of them's out

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They kind of get him back in line they all just want to be friends they all want to be friends they all want to do the same thing

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Adam's taken this to 11. I sense a serious escalation about to start

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Down at big break Marina all you got a good rage and fire

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Tori is zooming full speed ahead

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To test an emergency fire fighting trick

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Oh

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Tori's rooster tail certainly seems to have doused the boat

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But there's no smoke without fire so the guys reset

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Reset so we can do it again with one more pass just to make sure it's out. I think it's looking good though

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Skipper Bellachy takes another turn at fighting fire with speed

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Thank you

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There's no way that's on fire

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I think it went out with the first pass the second passes insurance

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I think the third time just for fun clearly you can extinguish a fire with an emergency U-turn

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But now that they know this fire fighting feat is no myth the question is should you?

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Try this at home that was crazy going at full throttle 50 miles an hour straight towards a flaming boat

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And then right before I hit it I had to crank the wheel to spray the water onto the flaming boat

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I totally can't believe it worked, but you know what I don't think I'd try this at home

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Yes, we were able to pull this off despite not being professional firefighters despite not being professional boat drivers

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But here's the thing in order to do this you need to

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Overcome your fear of driving directly at a flaming boat and be able to turn at the last second not to mention

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You need a jet boat

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Unfortunately, this is not something that just anybody can do yep

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It's always best to leave the firefighting to the professionals owner of just will let me borrow his boat again

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anytime

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Well the myth that metronomes have placed on a proper surface and activated together will eventually

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Sync themselves up seems to be on pretty solid footing got it to work with a couple got it to work with a handful

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But now it's time to go for broke

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In front of me here is an air hockey table and Jamie has set out carefully

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216 metronomes this is more than we have ever seen in any of the videos demonstrating this phenomenon in a few minutes

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We are hoping that we'll be setting an unofficial world's record

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Why are we using an air hockey table air hockey is a game in which the puck floats on a cushion of air?

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It's definitely floating and now our metronomes will float on a cushion of air

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That should allow them the low friction environment that makes them shimmy their way to synchronization

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So how do you want to do this?

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I'll start at this corner. Why don't you start at that corner and we'll just go for it. All right. You want to count it in?

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All right, three two one go

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It's a painstaking task to start all the metronomes one by one

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Done with my half, but now that they're ticking at the same tempo in theory. They should start that shimmy

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Now they're all going

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They're all going and they're floating on the cushion of air

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I really have totally hypnotized by the sound. I know

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But with 216 metronomes almost 20 times the amount of their last attempt

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Can they break a world record or will the metronomes march to a different tune?

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It's the do try this at home special and next up Adam and Jamie are investigating the old ball chain

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We all know what this stuff is regular chrome ball chain keys IDs and dog tags have been hanging from it for decades

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But we've got a viral video that seems to show this stuff under the right conditions

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behaving almost

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Against the force of gravity

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So supposedly this gravity defying feat is achieved without any special effects wizardry

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But are they yanking your chain or could you really?

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Recreate it with just a ball chain a beaker and if you have one a high-speed camera check this out

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Let's check out the high speed

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Hey, Adam

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It's like oh, it's like it's going all the way across the room Wow

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It doesn't look like it should be able to do that doesn't it now

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It's like magic that is freaking gorgeous

223
00:19:34,480 --> 00:19:36,480
That is so freaking cool

224
00:19:36,840 --> 00:19:38,240
cool and

225
00:19:38,240 --> 00:19:44,280
Surprising as the ball chain seems to levitate out and over the lip of the cup and this strange behavior

226
00:19:44,640 --> 00:19:46,640
It's gotten Jamie thinking

227
00:19:47,480 --> 00:19:50,360
Now we've got some bigger chain. Let's see if it goes further

228
00:20:01,280 --> 00:20:04,680
It does seem the bigger the ball the greater the effect

229
00:20:04,840 --> 00:20:09,720
But is this gravity defying act also related to the distance you are from the ground?

230
00:20:10,080 --> 00:20:12,640
Okay, let's see what this does from eight feet up

231
00:20:17,520 --> 00:20:19,520
That

232
00:20:21,280 --> 00:20:23,080
Made a difference

233
00:20:23,080 --> 00:20:26,860
It's clear from our testing that there are two key forces that are causing this effect

234
00:20:26,880 --> 00:20:32,120
And the first is that mass moving in a particular direction wants to continue moving in that direction

235
00:20:32,160 --> 00:20:37,200
So when we're yanking the chain up out of the pot it wants to continue moving upward

236
00:20:37,240 --> 00:20:45,280
but shortly after gravity starts to pull it down and so that's where we get this arc if one of these forces is out of

237
00:20:45,400 --> 00:20:51,240
Balance like as in if gravity starts to pull down too hard and we don't get as large in an arc

238
00:20:51,280 --> 00:20:55,040
But when these two forces are perfectly balanced coupled with the unique

239
00:20:55,600 --> 00:21:01,640
Symmetrical and slick design of this chain it all converges to create an arc that seems like it should be impossible

240
00:21:02,440 --> 00:21:05,520
But whatever the explanation, it's a really cool effect

241
00:21:08,120 --> 00:21:12,720
It's cool and to take it to the max Adams got this one all chained up

242
00:21:13,240 --> 00:21:20,320
Wow the biggest ball chain I could possibly buy whenever you ready here we go

243
00:21:26,240 --> 00:21:29,000
That was amazing that worked really well

244
00:21:29,520 --> 00:21:36,160
It's almost magical watching the chain flow seemingly defying gravity out of the cup

245
00:21:36,160 --> 00:21:40,800
My favorite part about it though is that it seems to be proportional to the size of the ball chain

246
00:21:40,800 --> 00:21:45,600
So you get a little loop with stuff like this and you get a nice giant loop with stuff like this

247
00:21:45,600 --> 00:21:49,680
I didn't even know they made stuff this big until this story. This is awesome

248
00:21:50,880 --> 00:21:54,480
Yep, this chain reaction is surprisingly DIY

249
00:22:00,840 --> 00:22:06,640
So break out the beakers and the ball chain and make sure that you do try this at home

250
00:22:11,760 --> 00:22:14,780
Next the team is on a chemistry safari

251
00:22:15,280 --> 00:22:21,560
All right these next chemical experiments fans want us to test one if they're genuine and two if it's something that they could try at home

252
00:22:21,560 --> 00:22:24,720
What are they elephant toothpaste and exploding snakes?

253
00:22:25,320 --> 00:22:29,080
Elephants and exploding things. Are we sure that this is something that people can do at home?

254
00:22:29,640 --> 00:22:32,840
Well with an ingredients list made up of household items

255
00:22:33,440 --> 00:22:40,720
Elephant toothpaste is the force DIY science to try all you needs a little hydrogen peroxide the kind you would

256
00:22:40,800 --> 00:22:43,360
Get for dyeing your hair liquid dish soap

257
00:22:44,200 --> 00:22:46,200
little food coloring for a pizzazz

258
00:22:47,400 --> 00:22:48,760
and

259
00:22:48,760 --> 00:22:53,960
Finally the catalyst which is plain old yeast. Are you about to blow her mind? I am

260
00:22:54,480 --> 00:22:56,480
stand back

261
00:22:59,400 --> 00:23:03,160
It's like a volcano from science fair look at that it's minty fresh

262
00:23:03,520 --> 00:23:08,280
It's easy to see why this super-sized foam is called elephant toothpaste

263
00:23:08,560 --> 00:23:11,560
Now in its basic form hydrogen peroxide is extremely stable

264
00:23:11,560 --> 00:23:15,080
But what's happening here is when you add the yeast it's

265
00:23:15,520 --> 00:23:22,520
Decomposing the hydrogen peroxide very rapidly and releasing oxygen the oxygen is getting captured inside the liquid dish soap

266
00:23:22,520 --> 00:23:29,160
Which is creating bubbles in this big foamy awesome mess and although it passes the try this at home test

267
00:23:29,360 --> 00:23:35,040
It's just a frothy fountain. So how about an only on myth busters twist

268
00:23:35,520 --> 00:23:37,520
Don't try this at home

269
00:23:38,720 --> 00:23:44,240
All right to take this experiment from go ahead try it at home to myth busters danger

270
00:23:44,240 --> 00:23:50,360
We're gonna use some lab grade components here. We have a higher concentration of hydrogen peroxide and for our catalyst

271
00:23:51,040 --> 00:23:52,880
potassium iodide now

272
00:23:52,880 --> 00:23:58,800
These are much more caustic chemicals here and the reaction is a lot more energetic

273
00:24:00,320 --> 00:24:06,120
Okay, so take two but this is definitely do not try at home

274
00:24:06,600 --> 00:24:12,440
One step back is it gonna get crazy? Yeah, you better drop some science on us. You ready? Yeah do it

275
00:24:20,280 --> 00:24:26,160
Much more energetic experiments look how hot it is. Yeah, the steam coming off. Yep

276
00:24:26,160 --> 00:24:29,400
That's the kind of toothpaste an elephant would be proud of

277
00:24:29,840 --> 00:24:36,920
But now we've seen the toothpaste didn't someone mention an exploding snake

278
00:24:36,920 --> 00:24:40,920
Now for the most part elephant toothpaste is a sort of experiment you can do at home

279
00:24:40,920 --> 00:24:45,440
This next one is a little bit different. It's called explosive snake

280
00:24:46,600 --> 00:24:50,680
Now the first part of it involves sugar which by itself is innocuous

281
00:24:50,880 --> 00:24:55,080
The part that makes it different is the other half which is this

282
00:24:56,280 --> 00:24:58,280
sulfuric acid

283
00:25:00,000 --> 00:25:07,000
Sepheric acid is corrosive. It's caustic and if you splash on your skin you could get severe burns so

284
00:25:07,760 --> 00:25:12,720
Unfortunately, not the sort of thing you want to try at home and to do this experiment

285
00:25:12,720 --> 00:25:15,360
I think I'm gonna need a slightly different wardrobe

286
00:25:21,200 --> 00:25:28,440
Ah, that's better so I've got an apron to protect my clothing acid gloves to protect my hands and a face shield

287
00:25:29,400 --> 00:25:32,920
For my face now it's time to mix up the elements

288
00:25:34,040 --> 00:25:38,440
It's another do not try this at home, but will it be explosive?

289
00:25:41,720 --> 00:25:43,720
It's coming

290
00:25:44,280 --> 00:25:46,280
Actually, no

291
00:25:48,200 --> 00:25:53,560
Okay, so what happened here? Well the acid interacts with the sugar and breaks it down into its components

292
00:25:53,840 --> 00:25:59,320
Releases water in the form of steam and leaves behind carbon, which is what the snake is

293
00:25:59,560 --> 00:26:03,920
Now it's a very cool reaction, but not necessarily all that explosive

294
00:26:03,920 --> 00:26:08,600
I think in order to be explosive it should be faster and more violent

295
00:26:08,600 --> 00:26:12,880
And I think I can find a reaction that does that so lab raider

296
00:26:13,240 --> 00:26:19,400
Imahara swaps out the sugar for a classified organic compound adds the sulfuric acid

297
00:26:19,680 --> 00:26:25,240
Then brings a little heat to the equation, but will this result in that explosive snake?

298
00:26:28,440 --> 00:26:34,440
Hey, don't play this is gonna happen really fast. Okay, this is it

299
00:26:38,760 --> 00:26:43,360
That's amazing it's an instantaneous process called deamadization

300
00:26:43,360 --> 00:26:52,720
This sulfuric acid dehydrated the compound leaving in its wake a flaky carbon snake

301
00:26:54,160 --> 00:26:57,680
So conclusion two explosive snakes by different means

302
00:26:58,240 --> 00:27:03,040
But unfortunately because of the sulfuric acid you can't try either of them at home

303
00:27:03,760 --> 00:27:09,760
So while both myths are confirmed unless you've got access to a lab tech and lab grade materials

304
00:27:10,960 --> 00:27:12,960
You can't try these at home

305
00:27:14,080 --> 00:27:20,160
Meanwhile back at metronome HQ

306
00:27:24,000 --> 00:27:26,640
Every now and then it sounds like they're getting together. Yeah

307
00:27:27,840 --> 00:27:34,480
I do think that they cross phases somehow, but I think they may be in sequence, but not in the correct position

308
00:27:34,720 --> 00:27:37,920
If you look down the line, there's no rhythm or reason to that

309
00:27:38,640 --> 00:27:41,600
It's a case of so far not so good

310
00:27:44,000 --> 00:27:53,280
What you're about to see could be dangerous we're trained professionals, so please leave the myth busting to us

311
00:27:57,760 --> 00:28:00,880
Next could this soda stunt do you harm?

312
00:28:01,920 --> 00:28:07,600
Next up is a story that should definitely never be tried at home or anywhere else for that matter given that it's illegal in a

313
00:28:07,600 --> 00:28:10,400
Bunch of states. What's that dry ice bombs?

314
00:28:11,040 --> 00:28:14,000
Yep. Well exploding things is never a good idea to try

315
00:28:14,320 --> 00:28:16,640
So why is it we're tackling it on this show?

316
00:28:17,040 --> 00:28:22,080
Because like it or not people do try this at home. These things put out a tremendous bang

317
00:28:22,160 --> 00:28:24,960
I think they also put out a tremendous bite. That's what we want to look at

318
00:28:25,200 --> 00:28:32,160
So we want to find out just how dangerous they really are exactly we're gonna look precisely at why you should not try dry ice bombs at home

319
00:28:33,200 --> 00:28:36,720
This diy device works on that old trapped pressure principle

320
00:28:38,000 --> 00:28:41,040
Which the myth busters know can be both spectacular

321
00:28:41,600 --> 00:28:43,600
and lethal

322
00:28:43,600 --> 00:28:47,360
But just how lethal will these dry ice bombs turn out to be?

323
00:28:50,400 --> 00:28:53,200
To find out adam's got to set his cap first

324
00:28:54,080 --> 00:28:59,280
The capping it and getting away is where the real danger is i've seen these things go off as quickly as a few seconds

325
00:28:59,520 --> 00:29:05,280
So I don't want to be anywhere near these things when we're trying to film them on high speed camera and assess their damage

326
00:29:07,840 --> 00:29:12,480
That might work now we're going to be conducting this test with bottles as different as this one and this one

327
00:29:12,480 --> 00:29:16,640
But I need to put the caps on all of them and my method is going to be using this thing

328
00:29:17,360 --> 00:29:19,920
Because it has a handy turning part out the front

329
00:29:29,520 --> 00:29:31,520
That's how we're going to do it

330
00:29:31,680 --> 00:29:36,400
Adam sorted the hands-free capping put your forearm into that hole

331
00:29:36,960 --> 00:29:40,560
But now jamie needs to give this dry ice combo a hand

332
00:29:40,960 --> 00:29:46,160
We want to find out exactly how dangerous this is to somebody that might be holding on to it

333
00:29:46,480 --> 00:29:51,120
Obviously, we're not going to use our own hands for that. So we're going to need some artificial hands

334
00:29:52,000 --> 00:29:53,440
beauty

335
00:29:53,440 --> 00:29:55,040
That came out perfect

336
00:29:55,040 --> 00:29:58,880
So we've got our complete set of hand molds now all we have to do is

337
00:29:59,360 --> 00:30:05,760
Put these skeletons in them and then put the tops on them and strap them together and fill them with rubber and we're good to go

338
00:30:06,400 --> 00:30:12,000
Since we're anticipating a little bit of physical damage to the hand. We might as well make it look good

339
00:30:13,840 --> 00:30:15,680
Oh, yeah

340
00:30:15,680 --> 00:30:17,680
Oh, it's so pretty

341
00:30:18,880 --> 00:30:21,280
Nice it's going to be perfect for the test. Yeah

342
00:30:22,240 --> 00:30:26,160
So now they can get hands on with their dry ice device

343
00:30:28,000 --> 00:30:30,000
I'm not running for my own recreation

344
00:30:30,320 --> 00:30:31,840
Who would do that?

345
00:30:31,840 --> 00:30:33,840
No, I'm running because this is our location

346
00:30:34,400 --> 00:30:35,920
For detonating

347
00:30:35,920 --> 00:30:39,280
The dry ice pops. That's right. We've come to the bomb range

348
00:30:40,160 --> 00:30:42,560
Because that's how seriously we take the danger of these things

349
00:30:44,000 --> 00:30:49,440
It's serious because although soda bottles are designed to resist the pressure of their carbonized contents

350
00:30:50,480 --> 00:30:56,000
Expanding dry ice is a whole another ball game. Perfect. So what are we doing?

351
00:30:56,560 --> 00:30:59,280
Well, we're putting frozen co2. Yep

352
00:30:59,920 --> 00:31:05,680
This stuff known commonly as dry ice inside a sealed container along with a little bit of water

353
00:31:06,000 --> 00:31:13,520
The water converts the frozen co2 to gaseous co2 expanding to between five and 800 times its original volume

354
00:31:13,760 --> 00:31:18,240
Which will increase the pressure inside the container to in excess of 100 psi

355
00:31:18,880 --> 00:31:25,220
At which point it'll rupture violently releasing all of that gas not unlike what happens when you set off an explosive

356
00:31:25,700 --> 00:31:27,700
Boom

357
00:31:27,860 --> 00:31:34,260
Yep, so now it's time to bring some data to the equation and find out just how damaging those booms can be

358
00:31:44,980 --> 00:31:49,780
Back at the shop what is your problem things are starting to wind down

359
00:31:50,020 --> 00:31:52,020
Ah

360
00:31:53,540 --> 00:32:00,340
Keep going keep going so adam and jayme are winding them up again remember kids. This is something you can do with that extra 200

361
00:32:00,980 --> 00:32:02,980
Metronomes you've got around the house

362
00:32:03,460 --> 00:32:09,220
After 30 minutes of ticking adam tries a last ditch attempt to nudge the metronomes into sink

363
00:32:10,500 --> 00:32:12,500
Oh, look at that

364
00:32:13,460 --> 00:32:18,100
But as soon as he stops they come out of phase they're starting to run out

365
00:32:20,740 --> 00:32:24,020
Ha and it's clear this game is up

366
00:32:27,060 --> 00:32:30,980
Jamie and I starting them one at a time were able to get them all going in a couple of minutes

367
00:32:31,140 --> 00:32:37,220
But they never quite got synced up you could hear them going in phase and out of phase that was out that was out

368
00:32:37,860 --> 00:32:40,900
And certainly looking down the aisles and through the columns

369
00:32:40,980 --> 00:32:46,900
They looked awesome and they sounded amazing but they never quite got all in sync together

370
00:32:47,060 --> 00:32:49,060
I love the sound that

371
00:32:49,220 --> 00:32:51,700
This is not a successful world record attempt

372
00:32:52,180 --> 00:32:55,860
So every now and then you could hear them sort of it sounded like they were marching in step

373
00:32:55,940 --> 00:32:58,180
And then they'd march right back out of step again

374
00:32:58,660 --> 00:33:04,020
This just totally didn't work despite the high tech low friction air hockey table

375
00:33:04,260 --> 00:33:10,260
The metronomes just didn't want to synchronize so clearly while these metronomes work fine individually

376
00:33:10,340 --> 00:33:15,700
There is enough variation in the manufacturing tolerance that to get them all ticking in perfect sync

377
00:33:16,260 --> 00:33:24,500
You would have to calibrate each one individually now if you want to cross calibrate 216 metronomes by all means go ahead and give it a try

378
00:33:25,940 --> 00:33:27,940
This one's so good

379
00:33:28,820 --> 00:33:30,820
Shut up

380
00:33:30,900 --> 00:33:33,620
This is the biggest fail we have ever achieved

381
00:33:34,500 --> 00:33:36,580
All that work. Yeah, you could try this at home

382
00:33:37,300 --> 00:33:39,300
Your results may vary

383
00:33:39,700 --> 00:33:41,700
See you next time

384
00:33:45,940 --> 00:33:47,940
Now

385
00:33:53,380 --> 00:33:57,300
Now we found this one on the internet a man made a video of water coming out of a hose

386
00:33:57,540 --> 00:34:01,540
And he made the water freeze in space. I did exactly what he said to do

387
00:34:01,620 --> 00:34:02,420
I got a speaker

388
00:34:02,420 --> 00:34:06,580
I taped a hose with running water to it and then I attached it to a tone generator

389
00:34:06,660 --> 00:34:11,300
Now there's one last piece to this puzzle and that's a video camera. You ready to have your minds blown

390
00:34:15,860 --> 00:34:21,300
Now watch this I can make it go backwards. I'm gonna take it to 22 hertz. It goes backwards

391
00:34:23,380 --> 00:34:28,180
Now the whole reason this optical illusion works is for shooting 24 frames per second

392
00:34:28,340 --> 00:34:34,180
If you set the hertz around 24 it vibrates the water so that the water is in the same place every single time

393
00:34:34,340 --> 00:34:38,100
The camera takes a picture which makes it look like the water is frozen in space

394
00:34:38,500 --> 00:34:42,900
And if you play around with the hertz you could actually make it look like the water is going in reverse

395
00:34:43,060 --> 00:34:45,560
It's not really but it looks like it kind of cool

396
00:35:03,140 --> 00:35:05,140
Wow, look at that

397
00:35:06,340 --> 00:35:08,740
That is the biggest test tube I've ever seen

398
00:35:08,980 --> 00:35:16,420
Now you've seen elephant toothpaste what I'm gearing up for now is something you've never seen on television before and definitely shouldn't try at home

399
00:35:16,820 --> 00:35:18,820
That is monster toothpaste

400
00:35:19,220 --> 00:35:20,980
We're super sizing it

401
00:35:20,980 --> 00:35:22,980
Go ahead take me up

402
00:35:26,100 --> 00:35:31,940
With over 200 times the raw ingredients this will be monster toothpaste

403
00:35:32,900 --> 00:35:34,500
You guys ready?

404
00:35:34,500 --> 00:35:36,500
I think the question is are you ready?

405
00:35:37,380 --> 00:35:39,380
She looks ready do it

406
00:35:39,940 --> 00:35:41,940
Okay, here we go

407
00:35:42,820 --> 00:35:44,820
This is monster toothpaste

408
00:35:48,020 --> 00:35:50,020
Oop all right go back me up

409
00:35:55,620 --> 00:36:01,620
Nice you want a brush oh my god, that's cool. That's insane

410
00:36:02,260 --> 00:36:04,260
That was crazy

411
00:36:05,540 --> 00:36:09,940
Carried this giant test tube she poured in the potassium iodide and then the thing erupted

412
00:36:09,940 --> 00:36:15,220
I didn't think it was going to go very high, but it did and look at the messing tree. So definitely don't try this at home

413
00:36:17,940 --> 00:36:23,940
Sure monster toothpaste sounding like a good idea at the time who has to clean it up, huh?

414
00:36:32,500 --> 00:36:36,180
Just how hazardous is a dry ice device to your health?

415
00:36:36,820 --> 00:36:40,020
Well now it's time to tune into the data and find out

416
00:36:40,500 --> 00:36:44,420
So david harding and his equipment which is in the form of some pressure sensing PCBs

417
00:36:44,660 --> 00:36:49,620
Play strategically around the explosion is going to tell us exactly how powerful they are

418
00:36:50,820 --> 00:36:52,820
David you ready ready?

419
00:36:53,380 --> 00:36:58,900
All right, ice is in the bottle. The sensors are in place cameras are rolling. It's time to add water

420
00:36:59,220 --> 00:37:03,460
Just add water you better go to a safe place

421
00:37:09,060 --> 00:37:11,060
Oh, it's getting bulky

422
00:37:11,540 --> 00:37:18,020
You know, it's funny CO2 is what's normally in those soda bottles. This is sort of extreme soda, isn't it?

423
00:37:18,180 --> 00:37:21,860
Yeah, I think this one's gonna go a little quick. I hope so

424
00:37:24,740 --> 00:37:26,740
Yeah, nice

425
00:37:27,700 --> 00:37:30,100
The piece just fell down after like five seconds

426
00:37:31,380 --> 00:37:35,060
The dry ice blitz the bottom but just how bad was it?

427
00:37:37,300 --> 00:37:41,700
What do we get three psi from that explosion that's it that's all however

428
00:37:41,860 --> 00:37:45,140
It looked like it blew out the bottom where we don't have any direct sensors

429
00:37:45,620 --> 00:37:49,300
So that might be in a falsely low rating. That's right

430
00:37:49,940 --> 00:37:53,220
And as it happens we've got some more data check this out

431
00:37:53,940 --> 00:37:55,940
Oh

432
00:37:57,380 --> 00:37:59,140
No way

433
00:37:59,140 --> 00:38:00,660
That's steel

434
00:38:00,660 --> 00:38:04,900
And it's steel with an angle on it. So imagine what that would do to your hand

435
00:38:05,140 --> 00:38:09,780
I mean, that's gotta hurt and that was just a little bottle. Yeah, let's try the big one. Okay

436
00:38:10,260 --> 00:38:14,260
So the 350 mil explosion was steel bendingly strong

437
00:38:14,740 --> 00:38:21,860
But as the two liter bottle distends and elongates with the expansion of the gases will it prove even more dangerous?

438
00:38:22,500 --> 00:38:27,060
It's changing shape at the bottom. Look at that. It's gonna be a good one. Wow

439
00:38:29,700 --> 00:38:31,700
Getting longer

440
00:38:32,900 --> 00:38:34,900
That was intense

441
00:38:36,740 --> 00:38:39,940
Intense just like the data from the PCB sensors

442
00:38:40,500 --> 00:38:45,780
The sensor results from the big bottle going off or in and they're more than double what the little bottle put out

443
00:38:45,940 --> 00:38:47,940
They were seven psi

444
00:38:47,940 --> 00:38:52,980
Now that's enough to cause permanent hearing damage as to what other kind of injury it could cause

445
00:38:53,540 --> 00:38:55,780
The sensors may not be telling the full story

446
00:38:56,980 --> 00:39:01,860
Show of hands who wants to ramp it up the numbers alone say you should never try this

447
00:39:02,260 --> 00:39:05,380
But there's still the damage test to go. Yeah, I've got a prediction

448
00:39:05,860 --> 00:39:10,900
I don't think the explosion we're going to see is going to be as big as this crater that jaymie made when he arrived at work this morning

449
00:39:11,460 --> 00:39:13,460
You happy? Yeah, let's do it

450
00:39:14,340 --> 00:39:17,860
But I do think that after watching what it does to the hands on either side of the bottle

451
00:39:17,940 --> 00:39:19,940
You're not gonna want to try this at home

452
00:39:20,100 --> 00:39:27,620
Frankly, I've always wanted to do this particular experiment from the start the expansion of the co2 pushes the hands apart

453
00:39:29,140 --> 00:39:32,020
It's moving won't be long now

454
00:39:32,820 --> 00:39:34,820
Oh

455
00:39:37,700 --> 00:39:45,300
That was loud. Yeah that violent rupture sent the arms akimbo, but although they seem to flail away from the pressure

456
00:39:45,780 --> 00:39:49,060
Surely they're not undamaged by all that psi

457
00:39:51,540 --> 00:39:53,540
I got a broken wrist right here jaymie

458
00:39:54,180 --> 00:40:00,740
Yeah, I I'd say so look at it whipped it around both of these. Yeah. Yeah. Yeah, we got some lacerations here

459
00:40:01,300 --> 00:40:08,180
Maybe some broken fingers. Yeah, we got a cup of fracture in the finger. Oh and check this out. There's uh

460
00:40:08,980 --> 00:40:11,700
There's plastic embedded in the flesh, right?

461
00:40:12,180 --> 00:40:17,300
It's going to be part of what ruined your day, although you won't be able to hear anyone tell you about how stupid you just were

462
00:40:17,940 --> 00:40:19,940
Because you'll have permanent hearing damage

463
00:40:20,660 --> 00:40:24,420
Yep, not only was the force enough to force bones through flesh

464
00:40:24,980 --> 00:40:28,980
A halo of plastic shrapnel was embedded into the hands

465
00:40:29,860 --> 00:40:35,620
Look, we call this episode do try this at home because we've spent more than a decade doing all sorts of random

466
00:40:35,940 --> 00:40:38,500
Dangerous things that you should totally not try yourself

467
00:40:43,540 --> 00:40:48,420
But we had to end it here with something we hear about a lot of people doing and we wanted to make it crystal clear for you

468
00:40:48,660 --> 00:40:53,940
And we think we have that putting dry ice and water in a soda bottle is no laughing matter

469
00:40:54,020 --> 00:40:56,020
You can be permanently

470
00:40:56,100 --> 00:41:00,980
Damaged by playing around with something this dangerous. Don't do it

471
00:41:06,900 --> 00:41:13,540
So we have microwaves speed boated synchronized levitated froth suspended and exploded

472
00:41:13,940 --> 00:41:18,180
And out of all of that four are definitely too dangerous to try at home

473
00:41:18,580 --> 00:41:24,020
And when it comes to the others, please make sure you're with a responsible adult and use your common sense

474
00:41:26,020 --> 00:41:28,820
You