Two factory workers are talking
The woman says, "I can make the boss give me the day off
The man 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
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