...don't drive it into a bog.
We visited Burns Bog in Vancouver, British Columbia (http://www.burnsbog.org/) and saw the famous tractor that got stuck in the bog in the early 70's. Two teenage boys stole a couple tractors from a nearby peat plant (no longer in operation), and drove the tractors into the bog. They got stuck, and while one tractor was removed with a helicopter crane, the other one remains there, almost completely sunk. Our boys sat and mourned for the tractor...and hopefully learned never to steal one (or at least don't drive it into a bog if you do!).