Old joke: A hitchhiker, looking for a ride late at night, gets into a car that is traveling very slowly. Once in, he realizes the car has no driver! Soon, t

Old joke: A hitchhiker, looking for a ride late at night, gets into a car that is traveling very slowly. Once in, he realizes the car has no driver! Soon, the car going very slowly up a hill, reaches a graveyard. At this point, the hitchhiker jumps out of the car and flees in terror. He looks back and sees someone getting into the car. He yells back "Don't get in!! That car is haunted!". The person getting in replies, "It can't be, I've been pushing it uphill for the last hour".