In order to keep both drivers and fans safe, every Monster Jam truck features caged driveshafts. This way the big hunks of metal can be contained should they separate from the axle or powertrain. Inside, each truck contains a full-containment seat with integrated head and neck restraints, a seven-point seat belt, and integration for the HANS device (a head restraint system that limits head and neck injuries) to ensure drivers remain safe while performing various screwy stunts. Still, work as a Monster Jam truck competitor does take its toll on the body, with driver Ryan Anderson joking that drivers' backs "[age] in dog years."