One Sunday at the end of the service the Pastor told everyone, "Next Sunday's sermon will be on Mark Chapter 17. I would like everyone to read that chapter before next Sunday in preparation for the sermon."
On the next Sunday the Pastor got to the pulpit and said, "Who read Mark Chapter 17 this past week to prepare for today's sermon?" Every hand in the congregation went up. The Pastor said, "Mark only has 16 chapters. I will now begin my sermon on lying."