A teacher tells kids that they will be asked a tricky question every Friday, and the one who answers correct will have a free Monday. So following Friday, she asks: "Howmany stars are there in the sky?" Nobody knows. The next one, she asks: "Howmany fish are there in the sea?" The response is the same. A little Joe gets pissed off, so on Thursday evening he tooks two pool balls, paints them both black and carries them to school. Just shortly before the teacher opens her mouth to give another question, Joe takes the balls out of the bag and lets them loose on the floor. "Who's the joker with the black balls?" the teacher screams. "Bill Cosby, see you on Tuesday," little Joe replies, leaving the classroom.