One of the scariest dinosaurs seen in the first film is the all-frills, all-spills Dilophosaurus. And yet, it’s most memorable features were all made up one way or the other. Michael Crichton, author of the original novel, invented the dino’s deadly venom-spitting ability, and Spielberg added the terrifying rattling neck-frill. In real life, the Dilophosaurus didn’t have either of these traits. And yet everyone who grew up watching the film now thinks differently.