Getting the day off

The brunette says to the blonde, “Watch me get the rest of the day off.”  The brunette gets upon her desk, jumps onto the light fixture, and begins swinging back and forth saying, “I’m a light bulb.  I’m a light bulb.”

The boss walks in, sees her on the light fixture, and says to the brunette, “You’ve been working too hard.  Take the rest of the day off.”

The brunette gets her belongings and walks out the door.

The blonde grabs her belongings too and walks toward the door.  The boss says, “Where are you going?”

The blonde says, “I’m going home.  I can’t work in the dark.”