A man phones a mental hospital and asks the receptionist...
A man phones a mental hospital and asks the receptionist if there is anybody in room 27. She goes and checks, and comesback to the phone, telling him No, the room is empty. "Good," says the man. "That means I must have really escaped."

A Night at the Asylum
Late one night at the insane asylum one inmate shouted, "I am Napoleon!"
Another one said, "How do you know?"

First inmate answers, "Winston Churchill told me!"

Just then, a voice from another room shouted, "I did NOT!"