This is the funniest joke I know. I've been telling it for over 20 years and I still laugh every time I do because it is still hilarious! It always makes people laugh.

A man is walking down the street next to a tall wooden fence. He hears what sounds like a large group of people on the other side excitedly chanting 'fourteen!, fourteen!, fourteen!'. He sees a small hole in the fence and looks through to see what is going on. A finger comes through the hole and pokes him in the eye as the people on the other side of the fence begin chanting 'fifteen!, fifteen!, fifteen!'.