Two factory workers are talking.
The woman says, I can make the boss give me the day off.
The man asks, And how would you do that?
The woman says, Just wait and see. Then, she hangs upside-down from the ceiling.

The boss comes in and asks, What are you doing?
The woman replies, I'm a light bulb.
The boss then says, "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 asks, Where are you going?
The man says, I'm going home, too. I can't work in the dark.