Two factory workers talking:

Woman: “I can make the boss give me the day off.”
Man: “And how would you do that?”
Woman: “Just wait and see.” She then hangs upside-down from the ceiling.

Boss comes in: “What are you doing?”
Woman: “I’m a light bulb.”
Boss: “You’ve been working so much that you’ve gone crazy. I think you need to take the day off.”

The man starts to follow her and the boss says: “Where are you going?”
The man says: “I’m going home, too. I can’t work in the dark.”