San Soo is pretty effective, it's kindave like Kung Fu without the flashy techniques in it. It uses the bodies reactions to pain to benfit the damage you can apply to someone else. For instance if you kick a someone ( male mostly ) in the groin they will bend over and if you simaltaneoulsy throw an uppercut you will need less force to cause more damage to their head because they come falling forward. "Be formless, shapeless, like water... You put water into a cup, it becomes the cup, you put water into a bottle, it becomes the bottle, you put it in a teapot, it becomes the teapot... Now water can flow, or it can crash, be water my friend." Bruce Lee