A doctor of psychology was doing his morning rounds when he entered a patient's room. He found Patient #1 sitting on the floor, pretending to saw a piece of wood in half.

Patient #2 was hanging from the ceiling by his feet.

The doctor asked Patient #1 what he was doing. The patient replied, "Can't you see I'm sawing this piece of wood in half?"

The doctor inquired of Patient #1 what Patient #2 was doing.

Patient #1 replied, "Oh. He's my friend, but he's a little crazy. He thinks he's a light bulb."

The doctor looked up and noticed Patient #2's face going red.

The doctor asked Patient #1, "If he's your friend, you should get him down from there before he hurts himself."

Patient #1 replied, "What? And work in the dark?"