So I was at school today, and we were doing martial arts. The teacher was showing me a move and I slipped out of it, I did it because it hurt and I didn't want to get hurt. So I slipped out and said it hurt. He got really pissed at me and pulled me up off the floor and slammed me in to the wall by the bone under my neck and pulled be about 1-2 inches off the floor and told me off for slipping out, even though it hurt like hell. Can I sue him for it, because all I did was slip out of a lock he was trying on me to show me?