Jurassic Park III may not be your favorite movie in the series. But that doesn't mean its effects weren't fantastic. In fact, the somewhat random third entry in the series boasted the biggest animatronic 'saur yet: the Spinosaurus. Stan Winston Studios recalls the details of that behemoth's construction, and it's wild to watch.

Jurassic Park III's Spinosaurus wasn't only more formidable than the T-Rex that had come before it; it was the biggest, heaviest animatronic dinosaur Stan Winston Studios ever managed to build, and though it might not have the same pop culture clout as it's predecessor, it's still an incredible accomplishment. Who needs CG, right?