This type of punch is best for close quarters encounters, wherein circumstances force combatants close enough that they might trip over each other's feet. If the fighter is close enough to land a fully extended punch, she is too far away for a hook. A fighter properly executes a hook when her forearm is bent perpindicular (or perhaps a little more) to her upper arm. Different schools of thought will teach different methods of fist-positioning, whether knuckles should be facing away the fighter, towards the fighter, or straight up. Regardless of the individual technique, the hook is no haymaker -- it is marked by quick, powerful strokes meant to discourage the balance and stamina of the opponent.