I was a bit in pre elementary, but nothing insane. Never got beat up or anything. I used to have these older girls that would tease me and throw juice on me on my way home.
One day I got pissed off so I grabbed a chunk of ice from the snow bank and shot it at one of the girls just to scare her and I hit her really bad did serious scratches to her face and she was bleeding, but at that point I did not realized because I was already running home. When I got home I was in deep crap. To this day, I don't even know how my parents already knew about it by the time I got home, considering she was behind me.
Then in grade 8, I had this guy in my class that always made fun of me. I ended up getting fed up and talked to the principal about it and it did get sorted. I still regret not beating him up though, I'm sure I could have taken him, he was actually about my size then which was small.
Come to think of it, I've come in close encounters but never into an actual fight.