this post was submitted on 16 Feb 2026
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Crazy Fucking Videos

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This experiment spectacularly showed how relative speed works.

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[–] nexguy@lemmy.world 17 points 1 day ago (2 children)

FINALLY. An alternate to slowing to a stop.

[–] MBech@feddit.dk 5 points 1 day ago

Now install this on busses everywhere, and we'll speed the whole process up significantly.

[–] Peppycito@sh.itjust.works 3 points 1 day ago

Huge improvement to the tuck and roll.

[–] D_C@sh.itjust.works 103 points 2 days ago (3 children)

Mythbusters did a version of this with a watermelon, or a ball.

Their version was entertaining, but this is a lot more dramatic.

[–] fahfahfahfah@lemmy.billiam.net 63 points 2 days ago (1 children)

Jamie wanted to do it this way, with himself being the projectile, but they wouldn’t let him

[–] SmackemWittadic@lemmy.world 27 points 1 day ago (1 children)

Hynie man always was a mad scientist type of guy

[–] M137@lemmy.world 5 points 1 day ago (1 children)

You say that like Savage isn't, they were both chosen as hosts specifically because of that.

[–] SmackemWittadic@lemmy.world 2 points 1 day ago

Oh Savage Adam is also a mad scientist, but he's the type of mad scientist who ends up just being a goofball. Think doofenshmirtz

[–] Hideakikarate@sh.itjust.works 26 points 2 days ago

They wanted to launch Tory out the back, but it was deemed too dangerous. Clip of the soccer ball.

[–] Hasherm0n@lemmy.world 3 points 1 day ago

The full video (linked in another comment) references the myth busters video in the first 20 seconds.

[–] JoshuaFalken@lemmy.world 49 points 1 day ago (2 children)

In case anyone else has an attention span, here is the full video.

[–] krashmo@lemmy.world 24 points 1 day ago

I don't, but thanks anyway

[–] unexposedhazard@discuss.tchncs.de 3 points 1 day ago* (last edited 1 day ago)

Im really annoyed that they didnt post the link to the original in the post and even slapped a false watermark on it. And even some people in the comments misattributed it.

[–] Sir_Premiumhengst@lemmy.world 9 points 1 day ago (2 children)

I want this on public transit.

[–] embed_me@programming.dev 15 points 1 day ago* (last edited 1 day ago)

Train that stops at stations ❌

Train that stops passengers at stations ✅

[–] Evil_Shrubbery@thelemmy.club 3 points 1 day ago (1 children)

I demand a more accurate system - I want to be yeeted directly through the window of my destination.

[–] Omgpwnies@lemmy.world 3 points 1 day ago

Public ~~transit~~ trebuchet

[–] albbi@piefed.ca 32 points 1 day ago (7 children)

What in the world would that feel like? Pretty fast acceleration, and then you're just standing still? Must be disorienting.

[–] Mac@mander.xyz 22 points 1 day ago

If you've ever jumped off a trailer, yes. Very weird.
Small note: when you're doing the jumping yourself its even weirder because you're used to landing with momentum. Your brain is expecting to have to land and arrest your momentum but then you're already stopped. It's such a weird feeling. lol

[–] Evil_Shrubbery@thelemmy.club 5 points 1 day ago* (last edited 1 day ago)

Yeah, exactly, still feels the same as accelerating to some speed (and then stop accelerating further), but afterwards you see that the ground around you isn't moving.

About the same as seating backwards in a car/bus/train/plane/bicycle/horse/(space)ship/running backwards/etc - ppl say it's disorienting bcs you are "pushed back in the seat & then you aren't moving anymore".

[–] mech@feddit.org 6 points 1 day ago* (last edited 1 day ago)

Like sitting in a car backwards when it brakes hard, and then the bottom falls out.

[–] RememberTheApollo_@lemmy.world 2 points 1 day ago* (last edited 1 day ago)

The same as braking to a stop in the same distance. That’s pretty much what’s happening here.

[–] iamthetot@piefed.ca 4 points 1 day ago

I imagine it might feel similar to running fast on a treadmill and then coming to a complete stop.

[–] ReluctantMuskrat@lemmy.world 1 points 1 day ago (1 children)

He's actually rapidly decelerating. It's like slamming on the brakes and coming to a stop, but backwards.

[–] Evil_Shrubbery@thelemmy.club 2 points 1 day ago (1 children)

He is facing backwards so if you are differentiating between acceleration & deceleration then he was accelerated bcs he was facing the same way we the vector.

[–] ReluctantMuskrat@lemmy.world 1 points 1 day ago* (last edited 1 day ago) (2 children)

Which way he's facing makes no difference. Relative to the ground, by which we are measuring his speed and on which he comes to rest, he is decelerating. Just as a seat belt presses against your waste and chest to decelerate you when braking hard, the chair he's sitting in is doing the same, but against his entire back.

I will however agree relative to the moving vehicle he is accelerating in the opposite direction of motion, but that not the frame of reference by which we've documented his moving velocity.

[–] Evil_Shrubbery@thelemmy.club 2 points 1 day ago

Acceleration is a vector with magnitude and direction.

[–] BanMe@lemmy.world 2 points 1 day ago (1 children)

The question is what it would FEEL like, not the technical physics.

[–] Evil_Shrubbery@thelemmy.club 1 points 1 day ago

Exactly.
Otherwise he might not have been accelerating at all compared to a meteor on the other side of the galaxy (by pure chance).

[–] rimu@piefed.social 2 points 1 day ago

Very weird. It'd be hard to ignore the reflex to curl up and instead put your feet down.

[–] Evil_Shrubbery@thelemmy.club 6 points 1 day ago* (last edited 1 day ago)

The two nerdy cannonballs on that lad ...

... are prob of just average size bcs the boio understood the physics/risks.

Actually, the demonstration would have been even more radical (as the kids say) if they fired a cannonball at him too. If they matched the acceleration & the engineering accordingly, he wouldn't get hit.

[–] Resonosity@lemmy.dbzer0.com 4 points 1 day ago

SO satisfying

[–] BagOfHeavyStones@piefed.social 15 points 1 day ago (1 children)

I like the comment on the source: This means the end of bus stops!

Not sure I'd want to be launched off a bus or train.

[–] Peppycito@sh.itjust.works 2 points 1 day ago

Hmmm... Now I'd like to see them do it the other way, launch him onto the truck!

[–] Sanctus@anarchist.nexus 17 points 2 days ago (1 children)

I thought that would happen but I was puckering anyway that shit gave me anxiety. I was like "wait just bare road and a helmet? What if something goes wrong?"

[–] LifeInMultipleChoice@lemmy.world 15 points 2 days ago (1 children)

Bare road and a helmet, if something goes wrong you've got yourself a controlled environment similar to a motorcycle riding experience without the danger of the weight of a motorcycle landing on you I guess. No cars behind you to run you over. Safe, not exactly.. but definitely a thrill seeking experience

[–] rainwall@piefed.social 9 points 1 day ago* (last edited 1 day ago)

Thats a good take on it. Its not explictly clear what gear he has on under the red jacket, but it looks like it might be a motercycle suit. These are full body and tend to be armored with kevlar and other material in order to blunt abrasion/collision damage.

With one of those suits, what looks like a good helmet and no bike to roll on top of you, you would likely survive a 30-60 mph "crash" off the end of the truck mostly unscathed.

[–] fubarx@lemmy.world 6 points 1 day ago

Where physics and math meet knees.

The guy laughing makes this way better

[–] redbrick@lemmy.world 5 points 2 days ago (2 children)

Now can we try that while driving in a circle?

[–] baltakatei@sopuli.xyz 3 points 1 day ago

So long as the ejection velocity vector is equal and opposite the tangential velocity vector, the result is the same.

[–] victorz@lemmy.world 3 points 1 day ago (1 children)

Wildly different outcome ⚰️

[–] TrickDacy@lemmy.world 2 points 1 day ago (2 children)

What exactly would happen?

[–] victorz@lemmy.world 2 points 1 day ago

They'd just be flung out by the perceived centripetal force (actually the outward swing of the backend of the vehicle's flatbed there).

Although the more I think about it, maybe not? As long as the catapult sends the cargo/"human" at the same speed as the very tip of the end of the flatbed, maybe it would be fine?

Disclaimer: imagining this with a fever isn't helping.

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[–] DarrinBrunner@lemmy.world 3 points 1 day ago (1 children)

Is it really an "experiment", or just an engineered stunt? I mean, nothing was learned.

Seems like something you'd see in a movie.

It was fun to watch, but let's not dress it up as more than it was.

[–] Mesophar@pawb.social 8 points 1 day ago (1 children)

Demonstration would probably have been a better term than experiment.

[–] Evil_Shrubbery@thelemmy.club 2 points 1 day ago

Yeah, "experiment" is just headline terminology by media standards.

[–] hperrin@lemmy.ca 4 points 1 day ago

There’s no practical difference between accelerating the other way and braking, so yeah, that’s what I would expect.

[–] victorz@lemmy.world 3 points 1 day ago

This has to be one of the coolest things any human has had the privilege of doing.

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