Working In The Dark

A doctor of psychology was doing his normal 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 number 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 lightbulb.

The doctor looks up and notices Patient #2's face is going all red.

The doctor asks Patient #1:

- If he's your friend, you should get him down from there before he hurts himself

Patient #1 replies:

- What? And work in the dark?