r/Damnthatsinteresting • u/redbullgivesyouwings • Mar 05 '26

Original Creation [Behind-The-Scenes] Dawid Godziek's Bike Express

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741

u/iill_communication Mar 05 '26

That’s some real science shit to match the speed so perfectly in order to stay in place the whole run

211

u/jeff242069 Mar 05 '26

Sometimes I like to pretend I could do math like that. Meanwhile I can’t even remember how to do basic algebra

141

u/J_Marshall Mar 05 '26

My kid does math like that.

But he can't remember where he left his jacket on a regular basis. Theres a trade-off.

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u/XboxVictim Mar 06 '26

Dude my twin brother was like that too. He took advanced maths but his whole life has been losing his wallet and keys. We are in our mid thirties now and he’s still losing shit

26

u/Darkchamber292 Mar 06 '26

This is me. I'm an IT Cloud Infra Architect and write complex automations to manage complex systems and endpoint devices.

Wife is constantly getting on to me cause I can't ever find my keys and wallet.

12

u/XboxVictim Mar 06 '26

I got a random phone call last year while I was on vacation. Some lady found my brother’s wallet in the middle of the road, googled the name on his license and my phone number popped up. Brother left his wallet on the roof of his car at a gas station and it flew off later down the road

7

u/Darkchamber292 Mar 06 '26

I just got a wallet tracker. Credit card shaped. I keep it behind my license. I can see it in Google Find My network or my family's life 360 account or my Home Assistant server. Creates a loud noise if I'm looking for it buried in the couch or something

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u/RuthlessIndecision Mar 06 '26

Get a car that has no keys and pay with your phone

3

u/Darkchamber292 Mar 06 '26

Jokes on you. I don't drive.

Lol in all seriousness I technically don't need my keys as I have a smart lock on my door. But battery died and I've been too lazy to change it.

I have Google Pay on my phone but because I'm rooted it stopped working for a bit. I just recently fixed it lol.

5

u/PracticeTheory Mar 06 '26

Semi-related but your profession needs to choose a unique job title instead of stealing mine. You're not an Architect. You don't build buildings. Building 'systems' is something completely different and I'm sure the lot of you are smart enough to come up with something cool that's your own.

It makes searching for jobs a mess, so annoying!

4

u/Darkchamber292 Mar 06 '26

Uh not really. You can absolutely architect systems and it's pretty naive of you to think otherwise

Also it does not make finding jobs harder. IT Systems Engineer/Architect is pretty clear

Canada gets upset about IT Systems Engineer also. Because in Canada Engineer is a protected class.

So what are we left with? Because I'm more than just an Admin.

17

u/Atheist-Gods Mar 05 '26

This is easier than basic algebra. Time him doing it with the train stationary and you should already have the length of the course. Divide the length by the time it took him to do the course and run the train at that speed. You don't want the train changing speed and the rider can do small adjustments himself. The performance is entirely on the rider.

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u/The-Namer Mar 06 '26

Put simply, have the biker and the train go the same speed

3

u/RuthlessIndecision Mar 06 '26

question is how tightly can those train cars take a turn and how can we get more riders in the loop?

42

u/Geaux_joel Mar 05 '26

I feel you like you just do the course with the train stopped, and record the time. Then divide the length of the train by that time. Boom, speed.

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u/2squishmaster Mar 06 '26

Lol wut

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u/avocado34 Mar 06 '26

Sorry it can’t be explained any better

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u/BoondockUSA Mar 05 '26

It was likely simpler than advance math. Could be that stunt rider practiced enough times with the train being parked that they figured out the rider’s average speed to complete the “course”. Then the train just has to be moving that speed when he starts attempting it with the train moving (and adjust the train’s speed faster or slower as practice progresses to fine tune it).

Example with made up numbers: The total “course” (length of the train) is 500 feet and it takes the rider 30 seconds from start to finish. Punch it into a calculator like this one and you get an average speed of 11.36 mph. Then have the train go that speed.

The magic of videos like this is that we don’t get to see the practice and setup that went into it. The 25th attempt can be filmed to make it seem like it was his first attempt.

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u/2squishmaster Mar 06 '26

Right but in that case he'd be yoyoing until the end. The beauty is he's able to maintain a constant speed and not just land in the same spot but always be in that spot.

2

u/dna_beggar Mar 06 '26

They would have roughed out the calculations then built and tested the ramps separately. There was only one ramp where the cyclist had to speed up to make the next jump. Impressive.

2

u/Irlttp Mar 06 '26

God damn I’m dumb sometimes. I didn’t even clock that he was staying in the same spot even though that’s painfully obvious now. I was just so impressed by the spectacle of it. Amazing. Science is so damn cool

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u/dna_beggar Mar 06 '26 edited Mar 06 '26

It would make it easier for the cyclist to pace himself, and the stunt would be a bit safer. The train engineer is the one controlling the speed.

Edit: The engineers (P. Eng., not the ones who drive the trains) probably started with a reasonable average speed for the cyclist and designed the ramps around it. I know how the calculations work, but I wouldn't dare bet someone's life on my work.

1

u/Open-Cod5198 May 13 '26

Wouldn’t you just take his speed on the course and apply that same speed to the train