Mary urgently needed a few days off work, but knew tat her Boss would not allow her to take leave. She thought that maybe if she acted 'crazy' then he would tell her to take a few days off. So she hung upside-down on the ceiling and made funny noises.
Mary's blonde co-worker, Britney, asked Mary what she was doing. Mary told her that she was pretending to be a light bulb so that the Boss might think she was 'crazy' and would give her a few days off.
A few minutes later the Boss came into the office and asked, "Mary! What in the name of God are you doing up there?!"
Mary told him, "I'm a light bulb! See how bright I am! Wheeee!"
The Boss replied, "You are clearly too stressed out! Go home and recuperate for a couple of days."
Mary jumped down and walked out of the office, followed closely by Britney, so the Boss stopped and asked her, "And just where do you think you're going, Britney?!'
The blonde co-worker answered, "I'm going home, too. I can't work in the dark!"