A man was wheeling himself frantically down the hall of the hospital towards the exit in his wheelchair, just before his operation.
A nurse stopped him and asked, "What's the matter?"
He said, "I heard the nurse say, 'It's a very simple operation, don't worry, I'm sure it will be all right.'"
The nurse replied, "She was just trying to comfort you, what's so frightening about that?"
"She wasn't talking to me. She was talking to the doctor!"