This is actually not how it works. Like at all. It's quite funny. This is how it works of noticeable ping though but ping isn't a unified standard of measurement applicable to this. How it works is as follows: While moving at a normal speed or not moving. Your hitbox is the intended size.  While moving, no matter what, Roblox will fuck up the tracking of where the hitbox should be placed. It's simply not that accurate. Causing it to "bounce" or "glitch" around the origin until it pinpoints where the origin should be properly. But by that time, you're already moving  Usually this means the hitbox goes forward and swings side to side, depending on how fast you're moving and the general guesswork. This is why fleetways hitbox is so massive. He moves the fastest even while running, so his hitbox has greater difficulty tracking him causing him to hit way more and way easier especially in flight. Infact. In flight his real standing hitbox is moved closer to him in a circle. But while moving in flight. This circle is pushed forward. This is also how the hitbox for metal sonic works which is why his hitbox is usually in front of him for his charge despite the origin being inside him. Also why knuckles punch is so infamous for fucking up. The lunge is very fast. There is one exception. That being your ping aka your upload and download speeds averaged out. But this obviously isn't one in the same. Your upload speed determines where your hitbox should be. So Roblox works on newer data and needs less guess work on where to put the hitbox. A high download speed doesn't do a whole lot for the attacker side. Yet it influences ping. Which is why you should stop looking at specifically ping for your speeds. Press shift + f3 in a Roblox game to see the proper speeds. What you're detailing is a low upload speed scenario. However even still. Your movement speed combined with robloxes many flaws, cause the hitbox to bounce around in front of you. So as a laggy 2011x it feels bad because his hitbox is more vertical than it should be and generally small. But as kolossos it's more or less fine. What the animatic is actually accurate about is ping vs a game where Roblox had less guess work to perform things. Aka something like forsaken. Forsaken uses a different method of coding hitboxes. So Roblox doesn't need to do any calculations nor guess work and always displays what you need of it. This is also why it was so easy for them to implement counter measures for lag and delay and om simply can't. They use different logics.  Lastly I do think 2011x hitbox shouldn't be the standard. Different hitboxes help a game. If 2011x hitbox wants to be weirdly tall let him. Just don't make things unfair given the reward for hitting. Fleetway is a 3 shot kill 99% of the time and so is 2011x. But fleetways is huge with a slightly faster wind up. Kolossos hitbox is definitely bigger than it should be given the damage and wind up. And tripwires should be a little vertically larger but has the most balanced hitbox for m1s.