Can't believe it was'nt mentioned, but inorder to not break your hand make sure to focus the punch between the first 2 knuckles, shortest distance between 2 points is a straight line, so punch in a straight line and get your bodyweight behind it. Important!...When fighting this is not Roy Jones Jr. shit...Hit to hurt!...I mean using the middle knuckle on the middle finger as a spear and aim for the eyes, throat, temples, and especially the solar plexus..