lol @ trying to put physics in this game.
Captain Falcon, for example, can jump ~12 feet into the air, do a complete flip while kicking, jump another twelve feet (he hasn't touched the ground yet) do another such kick, and then jump again, attracting his foes to his chest with some kind of magnetic force and then exploding them away in such a way that they go flying. If he misses with his final jump, though, he simply falls to the ground, where he is uninjured. He cannot kick on the way down, but he can mystically fall twice as fast.
Oh, and how about the move where he grabs them and throws them so hard that they bounce? I tried that on my girlfriend the other day. It doesn't work.
and don't forget that as a character is beaten, burned and electrocuted enough, they start flying farther when they get hit. try that sometime: take a chainsaw to someone and then punch them. Do they go farther? if you hit them with, say, an uppercut, do they go high enough that they dissapear and you can see them falling into the distance, presumably several miles away?