Megasaurus and Transaurus are transforming robotic dinosaurs. Megasaurus is owned by Mike West and Transaurus is owned by Rick and Sheri Dorritie. They are modeled after a Tyrannosaurus rex and have hydraulically activated arms, grasping claws, and jaws, as well as flame throwers set up in the head to give the effect of breathing fire from the mouth. They both fold up into a vehicle based on a tank and when the robots perform they initially appear as a box on tracks decorated as either a military vehicle (Megasaurus) or a dinosaur (Transaurus). Each robot is roughly 30 feet tall at maximum extension. They are used primarily to destroy cars by "eating" them (ripping them apart with the claws and jaws) at motorsport events, especially monster truck competitions.