A poison pen letter from the principal.
Putting a bomb on a disabled person's back and telling him to run.
The ability to tell a person to go to hell in such a way that they look forward to the trip.
Son: "I was the only one who could answer a question." Mother: "Oh really What was the question Son: "Who threw the eraser at the principal "
Daughter: Well the principal kept going on about the school spirit.