I don't know if this can be done. I have heard of it alot. It is where you are at hands length away from your target then close your fist as you thrust forward to punch. If this can be done i have questions about it. 1.) How powerful can this technique really be. 2.) Does the distance affect the punch. 3.) How good is this for conditioning your knuckles. 4.) Can you really break things with it.