In our boxing/karate class we are taught to punch with the first two knuckles, this isnt to prevent your arm breaking though, its so your hand aligns with your arm, which your putting your body weight into. It basicly makes your punches harder.
EDIT - By the way i cant see any reason not to punch with your last 2 knuckles, but theres more power the other way
Edited by crablord (08/14/06 05:29 AM)
"They say the only way to kill a lion is with a rear naked choke, but I'd just kick it in the head"