F*ck you gravity

What the fuck is going on in this picture

technically, there was no physics indicating they can't do that.

That was before Pbhysics was invented. Since people didn't know it by name, they weren't obligated to go by that. Sort of like the internet: "I don't understand something, so I'm not bound by it PLUS I have an opinion on it that's just as valid as someone who does understand it."