Dennis Anderson bagged grain for $3.65 an hour. He welded a monster truck from a wrecked 1950s Ford. Rivals mocked the junk heap, so he snapped back he'd dig them a grave with it. The name stuck. A booked truck no-showed a car-crush show, and his junker stunned the crowd instead. That truck became Grave Digger, the world's most famous monster truck. The weathered early Digger still sits in his family's truck museum.