Testing Spinosaurus animatronics on the set of Jurassic Park III (2001). By the time it was completed, Stan Winston Studio’s full-size Spinosaur measured nearly 45 feet long and weighed 25,000 pounds. Revisiting the approach that had worked so well with the T-rex rigs for The Lost World, the crew built the Spinosaur from the tip of its nose to the base of its tail, from the ‘knees’ up, and mounted it to a motorized cart that ran on tracks. The Spinosaur was not only the biggest and heaviest anim