Man calls the secretary of a Nuthouse and asks who occupies room fourteen.
“Currently …nobody.” – she answers.
“Great!” – exclaimed the man. – “So, I’ve managed to escape!”

A visitor to the psychiatric clinic asks the head doctor:
“How do you determine a patient is well enough to let him go free?”
“We do a simple test – fill a bathtub with water, put a thimble and a cup next to it, and tell him to empty the bathtub.”
“Right! Any normal person would use the cup.”
“No! Normal person would pull the plug.”