Ha ha

Two factory workers were chatting.  One said "Watch me get the day off" and he climbs up and hangs upside down from the ceiling.  The boss walks in and asks him what he's doing.  "I'm a light bulb" replies the man.  "Oh, you poor soul" says the boss "you've obviously been working too hard.  Take the day off". He gets down and starts to leave and his co-worker follows him.  "And where do you think you're going?" asks the boss.  "I'm going home too" says the second man "I can't work in the dark".