I cannot work in the dark

Two factory workers are talking, Thomes and other women.

The woman says, "I can make the boss give me the day off."

Thomes replies, "And how would you do that?"

The woman says, "Just wait and see." She then hangs upside-down from the ceiling.

The boss comes in and says, "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."

Thomes also starts to follow her and the boss says, "Where are you going?"

Thomes says, "I'm going home, too. I can't work in the dark."