Simon- I'll tell you how stupid you can be as a teenager and your underdeveloped ability to hold your reactions in check. I slugged my High School Gym Teacher, he came up on me for something I was doing and I slugged him, oh man was that a mistake.
Ha, I once had a fight during a lesson but avoided ever hitting the teacher - the kids hit the blackboard right next to where he was writing on it though.
There was a brief period after that when all the "tough" kids would shout "Rocky Rocky" when I walked in, LOL