One time while getting gas, I forgot, or didn't put my '75 f250 in park properly, jump out of the truck and before I could turn around, it was scooting across the parking lot in reverse, across the street, and through the wall of the local hardware store, the wall where they had all their cheap glass trinkets.
Not even a scratch on the truck, just a little store paint on the bumper. I've bought F250's ever since.