My money is on Bruce Lee.
He could make Manny stand with his stance completely front on, put a chair behind him so that he can't move his back leg out and then knock him off balance by pushing him backwards an inch or two.
Sorry... I typed that wrong... what I meant to say was that Bruce Lee could generate so much force with only a one inch punch that he'd knock Manny over...
there is a reason you will never see footage of this being done when
a) the guy being hit is in a martial arts stance (ie a boxing stance(
b) he doesn't have a chair behind him
Anybody who can look at the feet in this video (ignore the upper body) and then choses not to see what is going is is a fanboy!
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