The fourth-grade teacher had to leave the room for a few minutes. When she returned, she found the children in perfect order. Everybody was sitting absolutely quiet.

  She was shocked and stunned and said, "I've never seen anything like it before. This is wonderful. But, please tell me, what came over all of you? Why are you so well behaved and quiet?"

  Finally, after much urging, little Sally spoke up and said, "Well, one time you said that if you ever came back and found us quiet, you would drop dead."