When I was teaching 5th grade art, a very disturbed young man and a bully to boot, kicked a young lady squarely in the knee, because she tripped over his foot as she was collecting drawing boards. She had about four boards in her hand and they were actually thick masonite boards. As a knee-jerk reaction, she hit him over the head with the boards. He was very stunned, although not seriously hurt. On investigation, I found out that he had been terrorizing all the kids in the class with a pair of scissors. He was stunned, because he thought no one would actually stand up to him. The young lady was a very well-mannered and quiet girl. I think he found out that those are the ones you have to watch out for! 😄