Taking down a mugger with a reverse hook kick... This video demonstrates the principle of "Reaction Force" in Taekwon-Do's Theory of Power. The mugger's forward momentum clashes with the martial artist's foot and knocks him out. The mugger is knocked out with little effort, not because the martial artist kicked excessively hard, but because the force of the kick plus the mugger's forward (running) momentum are combined and culminates on one vital spot ("Concentration") -- the muggers face.
