There once was a man who loved to collected miniture tractor toys. But one day he decided to quit collecting them. The next morning the man was walking to town when he saw a building on fire and a child was stuck at the top screaming. The man ran into the building and inhaled all the smoke, stopping the fire. He walked back out and the fireman says to him ' how did you do that?'. The man said I'm an extractorfan.

If you don't get it - an extractorfan is the fan in most kitchens that gets rid of smoke and also the man used to be a fan of tractors so he was an ex tractor fan.