An elderly couple are both lying in bed one morning, having just awoken from a good night's sleep. He takes her hand and she responds, "Don't touch me."
"Why not?" he asks. She answers back, "Because I'm dead."
The husband says to her, "What are you talking about? We're both lying here in bed together and talking to one another. What in the world makes you think you're dead?"
His wife answers, "I know I'm dead, because I woke up this morning and nothing hurts!"
(from Pastor Tim's CleanLaugh List, http://www.cybersalt.org/cleanlaugh)