TyrannoSLOWrus rex According to a recent yahoo article, paleontologists built a model of a tyrannosaur skeleton to estimate its center of gravity and thusly its range of speed and motion. The study shows t-rex was probably not the lively man-about-town we see in Jurassic Park, but more of a hulky, lumbering juggernaut who had difficulty turning quickly and whose leg muscles were not large enough for fast running. To me, this means t-rex is just a little bit more like Darth Vader, and I'm alright with that! More importantly, for any of you looking to animate a therapod like the mighty tyrant lizard king, there's a handy breakdown of how dinosaurs may have walked. Science rules.