What did the doctor say when the nurse told him the invisible man was there?
Tell him I can't see him.
What do you call a crate of ducks?
What's black and white and red all over?
What type of school requires you to drop out to graduate?
Why did the two science teachers start dating?
Why were dancers in the '70s always sick?
How much does freedom weigh?
How did the mountain lion slim down?
What do you give a pony with a cold?
Why do we never tell jokes about pizza?
What do you call a surfer with a paper cut?