A doctor of psychology was doing his normal morning rounds when he entered a patient's room. He found a patient sitting on the floor, pretending to saw a piece of wood in half. A second patient was hanging from the ceiling, by his feet.
The doctor asked the first patient what he was doing. The patient replied, "Can't you see I'm sawing this piece of wood in half?"
The doctor inquired of the first patient what the other patient was doing. The first patient replied, "Oh. He's my friend, but he's a little crazy. He thinks he's a light bulb." The doctor looks up and notices the second patient's face is going all red.
The doctor asks the first patient, "If he's your friend, you should get him down from there before he hurts himself." The first patient replies, "What? And work in the dark?"