I was in a crowd of people walking through some swing doors. The person to my right had pissed me off a bit. They weren't looking as they pushed with both hands against one side of the swing door to go through it; I pushed both the person's hands down with one arm and pushed their head as hard as I could into the door before they could turn and see who did it. This was at school and the dude is/was a twat, I think he had a headache for LongTime mwahahaha!