An old man woke up in the recovery room after an operation and said, “Thank God that’s over!”

“You’re lucky,” said the guy in the next bed. “They left a scalpel inside me and had to open me up again.”

“How terrible!” said the old man.

Just then, the surgeon who had operated on the old man stuck his head round the door and asked, “has anybody seen my hat?”

The old man fainted.