Trainees

Two Trainees working in the same office, one wanted some time off, but knew the boss wouldn't allow him to take leave.
He decided to act crazy so the boss would tell him to take a few days off. He hung upside down from the ceiling so the other Trainee asks him "What are you doing?"
"Ah pretending to be a light bulb so the boss will think I'm crazy and give me time off for a few days".
Just then the boss walks in. "What are you doing?"
"I am a light bulb" the trainee says.
The boss then said, "You are obviously very stressed. You need few days off to recover...go home and come back when you feel better."
The other Trainee starts walking out the door too...
The boss asks him "Where do you think you're going?"
The other Trainee replied "I going home....I can't work in the dark."