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 very interesting fact
Doctor: Did you know that there are more than 1,000 bones in the human body?

Larry: Shhh, doctor! There are three dogs outside in the waiting room!