Okay here's a groaner for ya's... (kinda long)
There is this guy who is into tractors in a huge way. He eats, drinks and sleeps them (sad innit?)
Anway, he's taking some time off from work one day, and goes for a walk in the countryside. While he's out there he finds a tractor that is unattended and decided that he's going to have a go. He gets in, starts it up and proceeds to drive it along the road.
Somehow he manages to lose control and the tractor rolls down a steep slope and ends up as a crumpled heap in a ditch. He spends a few weeks recoverinbg in hospital and swears to himself that he'll never go near another tractor as long as he lives.
While he is in hospital there is a fire in the kitchens. The man decides to be a hero and hobbles down there to see if he can help. The man gets to the fire and suddenly sucks in a deep breath and all the flames get sucked in with it. The fire is totally extinguished.
A nurse runs up to the man and says "wow, thats great! How did you manage to do that?" To this the man replies "I'm an ex-tractor fan"
:-D