The only one that really stands out was my freshman year when someone got powerbombed through a table in the hallway at the end of lunch.
Coming from a pretty urban school, we had a great deal of fights. Of course, I always seemed to either miss them or be unaware they were happening. Others, meanwhile, could sense them if they were on the same floor. A fight would be happening 30 feet from me down the hall, I'd naturally be oblivious to it, and would only realize a fight was happening because I was suddenly being almost stampeded by dozens of people whose fight detection senses weren't as weak as mine.