Heh. Good stuff.
I think people knew not to pull pranks with me...I set the tone early...
My big brother was razzing me at a playground in front of all his stupid friends...I walked around casually...he was sitting on a bar on one of those metal merry-go-rounds...I pushed his face and he bloodied the back of his head pretty good...
My father asked what I was thinking? I was thinking I'm not taking that.
In 5th grade a guy was being a tool with me while waiting to get into the cafeteria for their low-grade dog food...I grabbed him by the face and beat his head into the brick wall...
Principle asked me what was I thinking? I was thinking this will stop that crap.
Also fond of grabbing guys by the throat...or manhandling them like a pretzel and smiling while they hit the ground cause they're clumsy...

A side effect though is extreme case of not liking to give up...
I fought one friend of my brother all summer one year...
Every night I went in the house with a bloody nose or fat lip...but I'd go right back the next evening for a re-match...
My folks thought there was something wrong with their middle kid...though my father seemed less inclined to think so.