Quote Originally Posted by DarthEnder
I don't really understand 3rd Gear much in the same way I didn't understand 2nd Gear till they recently explained it.

I mean, he said something about bones. But it looks like all he's doing is filling his body with air. Okay, yeah, that would make you big, but how would that make you hit stronger?
Force = Mass x Acceleration

Larger mass and higher acceleration will lead to more force.