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AI Invents New Swimming Stroke
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- Published on Feb 8, 2026
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I think the best question to ask is how did someone manage to crash a ship that badly?
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CASEY ACT 2913
AYYY It is an honor for the rag doll to be named after me :) I am very happy you liked the replicas. Thank you for your top notch videos keep up the amazing work! (my day is so great thank you for asking)
This video was quite boring.. I don't know what you are talking about!
@jjjameson3379 The guy did very good work! And you perfectly know what the guy is talking about. And why are you leaved a comment?
@jjjameson3379 none of b2 studios videos are boring 😮
@jjjameson3379bait used to be believable
@jjjameson3379 Of course the guy with the J. Jonah Jameson account would be a jerk… checks out, honestly.
I'm not sure it invented a swimming stroke so much as it's having a stroke swimming.
E
its because the moving punishment being stupid and dumb just like this guy's head it should've been punished more for changing direction rapidly and punished less for longer strokes.
@crusher9z9Jesus man people make mistakes 😭
@Alcatrazz21 nah man he's pumping out half baked slop glop because he won't take the decision to throw it in the bin and code it so it actually works, he knows the viewerbase doesn't care that much because 'silly red squares man seizure funny laoLOLOLOL.' low effort and low intelligence at the same time.
@crusher9z9bro why are you so mad LET’S SEE YOU DO ALL THIS
To be fair, this does look exactly like what someone swimming on 10 days of training with absolutely no guidance except a sphere of death would swim
The ai doggy paddle
E
@EEEEEEEEE
@EEEEEEEEE
@EEEEEEEEE
Make him ride a horse, and the horse needs to learn how to walk at the same time
Up
this sounds amazing
Next title: ai learns to ride ai horse
YES
YESS
"Here's the racing AI, it's fast and it can go straight"
*shows clip of AI slowly derping along in a less than straight path*
I think the AI would swim very differently if it had a set of nice buoyant lungs.
E
or if it was punished for acceleration of the limbs instead of motion. We swim in nice continuous strokes because IRL if you get your arm moving it is easier to keep it moving rather than whipping it in the other direction.
@horntx A stamina system using data from the motion of the joints could help promote typical swimming by having the stamina "meter" go down based on the speed of movement of each joint, but would also have a constant but slow recharge to prevent stamina from running out entirely. Penalizing the ai for having stamina go lower than a certain point and substantially reducing movement speed when stamina drops to zero would encourage the ai to make more efficient and controlled strokes rather than violently vibrating.
@beanboy6934 uhhh unless "guy" is bouyant enough, when he stops moving would Just sink down but idk If that is enough of a detterent
Also moving that much doesnt like
Burn a lot of oxigen?
(im reading too much on this arent i?)
Lungs are for the weak
7:00 That's unfair... Anytime I try a swimming stroke like that the lifeguards at the pool drag me out and call an ambulance because appearently I am having "a stroke" or something...
lmaoooo
E
Yeah, theres many types of strokes. Breaststroke, butterfly stroke, etc. Idk why the lifeguard would be worried. Maybe they're just jealous?
@masterlightningpanda8665 probably
@masterlightningpanda8665i love your humour
"There aren't any characters in my videos who can swim"
Literally all the fish patrons O_O
I mean it's funny that they can't swim
E
Yeah they swim in the air not swim in water.
its like the underwater ocean in spongebob
thats the JOKE
I love how the racing AI basically looked and the human body and said "but what if you were actually a jellyfish?"
I remember in the Spiderman video b2 said the AI has about the neural capacity of a jellyfish so it's only natural.
Yep that's about it when the AI has no self-awareness (and at least a fully developed brain).
@gray007nl10% the neural capacity of a jellyfish
Now this is exciting, because its entirely possible for someone to go test whatever swimming technique that ends up being made
It’s def gonna go feet first.
Realistically not gonna work sadly because a. The ai probably doesn’t have the correct muscles/muscle strength for a human and water doesn’t really work the same in software as in reality
@Kero676they never claimed it would work
You might be able to swim like this for 5 seconds
@b2stud worth it
i can't believe you got me to watch a furiously-jostling red guy jerk around underwater for almost ten minutes straight. excellent work.
I *wish* I could swim like Guy could, he’s an inspiration.
The sudden transition from calmly explaining to cussing out a fish at 5:26 was comedy gold
The Stroke stroke is the way to go apparently
🤣🤣🤣🤣😁🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣
I think this wouldn't have looked like Guy was exerting the maximum possible amount of energy to swim if you had minimized acceleration of limb movement instead of direct limb movement.
I think it would make the most sense to penalize physical work.
I don't quite remember how it was implemented, but I believe that the velocity of the limbs is set by the brain. I would guess that the result would look much more natural if instead the force on the limbs was set, and the velocity derived from that.
Rather than changing the AI reward system, he could also make Guy more realistic; Guy moves *way* faster than a human can. Real human muscles can't immediately produce the full force they're capable of, instead they start at zero force and take a moment to 'ramp-up'. I suspect that if Guy behaved more like this, the strategies found in many videos would look a bit different.
@Qfeys That would add another layer of complexity to the AI's task, which would likely increase training times drastically and provide little benefit. As long as the AI achieves human-like movement in the end, there's no problem allowing it to flail about inhumanly during training. So b2s ultimately had the right idea: let the AI flail about however it likes, but reward human-like behavior / punish inhuman behavior. There may just have been alternate ways of structuring the reward system. For instance, since force can be calculated from change in momentum divided by change in time (technically, this would be net force rather than applied force, but minimizing net force will also minimize applied force, so it's good enough for training purposes), let the AI control its limbs at will but punish it for exerting forces over a certain threshold for each joint.
"there aren't any characters in my videos who can swim" already off to a great start
E
The patrons:
Majestic. Like watching a dolphin surfing the bow wake of a boat.. then having a stroke, and getting sucked into the propellers.
Don't let the swimming AI distract you from the fact that this man just committed cold-blooded murder at 5:36. Remember, it's not a crime if it happens in international waters and there are no immediate witnesses.
Well, it's harder to be caught in international waters, but it is still a crime. If not committed on a vessel registered to a specific country, you are practically opening yourself up to being charged by any and every country that wants to charge you.
@sol_x_dierDo I need mention the king of mars and therefore mars pirate
That moment caught me completely off guard cause I thought this was a science video
Only If you're actually in international Waters. If you're on a boat, it's a crime in the Nation the boat is registered in
@enderkatze6129 this is an unmarked island in international waters
Guy may not be the world’s greatest swimmer, but he’s got lungs of steel. Being able to hold your breath for 9 minutes and 50 seconds whilst doing great physical activity is no joke.
The cardiovascular system on this man... Sorry, guy.
5:28 him starting to shout and go out of character outta nowhere made me laugh really hard 😭
Fr🤣🤣
"He can only hold his breath for 590 seconds"
Ah, so Guy is short for Guybrush
Now that's a deep cut... the kind one might get after being told they fight like a milkmaid.
MISTER Threepwood!
I would like to see the swimming technique developed without punishing large movements.
I agree. This can't possibly be the "most efficient" method.
yesss
That is definitely a stroke
1:04 WHEN DID THEY ADD OLYMPIC THRUSTING?! I want to watch more
that's just what the olympic village turns into every single time
So, guy did get back before drowning with the coins, but i feel compelled to say his butt first technique was probably not the right way to get back to breathable air.
I like how in one of your first videos, a bunch of people got upset that you didn't show enough of the AI doing its thing, and it seems like every new video has been an escalation of you responding "oh, you want to see the AI? Well fuck you here's half an entire video of AI flopping around"
And you know what? It's great! Keep up the good work.
3:45 I've never felt so betrayed
"there aren't any characters in my videos that can swim" as he says with fishes as side characters
2 more important physics:
- higher pressure at lower depths
- timer runs quicker the more energy is exerted
perhaps try a penalty for jerk in future videos? to force the AI to make, umm, smoother movements?
Giving a tiny penalty for any movement, so it learns to optimize energy is a good idea.
it’s only flapping it’s feet. very fast
5:25
@Ana_Ngthis is literally the problem. instead he should have punished high acceleration of the limbs and not their speed
@marinellovragovic1207 sure, that makes sense
Bro is having a stroke while swimming
AI invents the stroke stroke
You are saying this like you were surprised
This seems more like a seizure
why do you think they call it back strokes?
I stroked to this comment
"Anyway... here's the racing AI, it's fast and it goes straight." 0_0
*violent hip thrusting*
yeaaaaap. just how I swim fast.
_slowly veers to the right_
The banjo Kazooie transition into the deep sea cavern... beautiful
I appreciate my fellow banjo kazooie fans
@b2stud my favorite series to this day
This went from "haha funny wiggly man" to "nail-biting primal anxiety" in record time.
When you realise the death was preprogrammed and the timer is post production the anxiety slips away =)
I sure hope you added an air factor so I don't drown trying these
i think you'd break every bone in your body if your limbs moved like this
@Gobbler.you are assuming that they would have bones
2:44 A fire breathing kangaroo?!? Honestly, I never get tired of the non-sequiturs in your videos. Though nothing will ever top the space kangaroos from the trajectories video.
is he Australian or something?
9:40 I should call her...
“There aren’t any characters in my videos who can swim.”
What… about the fish?
The fish are cheating. Natural talents don’t count.
OH! I think swimming is an idea i threw out during the community post for "worst video ideas" lmao. I'm excited for this one
Thats a long time without an oxygen tank, guy is built different
his chest is all lung and nothing else
“Built different” is a very apt way to describe a fellow who swims like *that*
When guy came back up, i started hearing the sonic drowning countdown music in the back of my head
Fr lol🤣🤣
You need to do an AI Olympics where different AI compete in categories for the gold silver and bronze medal
0:15 Is that a banana cabana?
I see the AI has adopted the spiral propellor stroke, where one twists and turns their limbs to drill through the water and using the remaining unimportant limbs to create drag to turn.
Just about died when you deleted the sand castle and vowed to refund the patreon lol
Fr🤣🤣
now the question is... what the family of the victim ever compensated?
@AngelDustIsSus I didn't know sand castles had families
2:46 Nice of one of the Space Kangaroos to step out of their ship instead of blasting from afar like they usually do. Guess even they can't resist the allure of an Earth swimming hole.
Bro has THE lung capacity, he took all of everyone else's. 🗿
"a fire breathing kangaroo" is my new favorite shape
Basically Guy became a jellyfish.
How didn't we discover this swimming stroke earlier? Even babies can do this! ...once.
There's so many cool little details in this video, so much effort going into too many things
I especially like the return of the evolving speedy fish bois at 12:00
RIP Verzart of Vhonowslend he was a real one
15:19 "If you subscribe in the next 10 minutes, you'll got a 0% discount"
Any chance of a future A. I. that looks at a situation and has to select one of your previous A. I.s to assign to dealing with it?
An A. I. selector A. I.?
Next time on AI: ai learns how to skydive
4:10 RUclips actually crashed here lol
his stroke looks like hes having a stroke
As a matter of fact, I *do* want to see more ragdoll swimming. You have 24 hours to meet my demands
This is how i swim, had lifeguard called as apparently looked unusual😅
Why bother swimming into the hole when there's always money in the banana stand? 🍌
He instantly invented a new swiming stroke 0:43
That’s the trained AI from another project
the dancing iron golem stroke
it seems the vast knowledge of the AI that human minds cannot comprehend has decided that seizures are the ultimate technique for any and every sport imaginable.
Imagine how much energy you would expend "swimming" like that.
isnt this the most ironic of the 'ai learns how to' videos because your characters are literally all fish
This looks like a controlled drowning
Verzart of Vhonowslend will not be forgotten.
He shall exist forever in his castle.
Yeah he definitely looks like he's having a stroke while swimming
There is no swimming here, only stroke
Guy is doing things in the water at 0:38
You probably could of gotten something more "Doing a breath stroke" and less "having a stroke" given it an energy meter which slowly fills up and is expended when a change in force is applied (Like if the AI is telling the joint to go in one direction then tells it to go a bit faster, it loses less energy compared to telling it to apply force in the opposite direction). Then just punish it exponentially based on how low the energy meter is. That way, it would behave less like someone being tased and more like someone whos actually trying to move something in a direction
The end part reminded me of octodad. Especially the crazy movements and the weird close corner camera angles.
5:05 why have i suddenly have the urge to hold my breath and count to ten. Idk why i remembered this after 7 days from when i watched this but it did
I can't even begin to imagine the muscle cramps from swimming like that.
Maybe caping the power and force output of the joints could make it learn some more natural movements?
4:51 believe it or not, THIS is what peak human performance looks like
Maybe I should try having a seizure in the water and see how well I swim…
0:39 bro started moving a like a mosquito larva
He wasnt kidding when he said it was a swimming *stroke*
never knew seizing underwater was a good swimming tactic, might try it sometime
That fish food hunt simulation is such a cool detail to include!
Such majestic movements. I saw people try this technique on dry land but they forgot that they don't need to hold their breath
Imagine diving in a dark cave and you see Guy.
You would feel the jittering in the water.
i like how the volleyball game in the background may be foreshadowing another vid or just a random side project
therapist: the red michelin man isnt real and cant hurt you
the red michelin man: 3:48
Got soo excited. Then saw premieres in 11 hours
It is now 11 hours since
The ultimate swimming strat: squid stroke
The awesome new skill, the Heatstroke XD
This swimmer’s hands and feet would fly off.
I love your little guys, their solutions to problems always make me smile.
I think one thing that makes their approach so different to real-life ones might be the lack of punishment for "jittering," as in, changing movements rapidly? As anybody who has ever tried to punch like they're in Jojo's Bizarre Adventure can tell you, it's actually REALLY hard in real life to jerk around like that, and expends a lot of energy.
If they were rewarded for more elegant movements, I bet they'd end up looking a little more like, for example... swimming, lol
Used this video as a great way to learn to swim! Going scuba diving tomorrow as a way to test it. Wish me luck!
1:05 an ad rolled and i legit thought that it was the end of the video lolol
I find it funny that Guy doesn't even take a breath at the end
I’ve been watching this dude since the first few teaching ‘ai videos’ and game devs NEED this man
He was clearly just having a convenient seizure that happened to have moved him in the correct directions 🤣
I feel like CodeBullet took over your channel at 5:33.
RIP Guy. Collected the coins, but perished seconds after reaching the surface.
0:55 the water after 9 months: 🤰
wow thats such a cool swimming technique! I'll be sure to try that the next time I'm in a pool!
the poor mans getting deleted for attempting to communicate
AI is wonderful at probing out and exploiting any defects in the physics simulation. ❤
He's just like me fr
Yes i want to see more of that .
as a former swimmer 0:47 is the realest thing i've ever heard
Perhaps assigning a Maximum speed the AI can move a bodypart by itself might've helped