when they really punch, just grab them wid all ur strenght and
bang their head against a protruding angle from the wall
repeat continously for 5-7 times
if a group, try to break someone's arm, then when the 2nd person
ambush from behind, elbow them, and lean back to push
them.....
for better way, refer to the thread on 'how to react when someone
hold u leg when u kick" or sth liddat