The Dilophosaurus's venom-spitting and neck-frill became so iconic that almost every other appearance of the animal in popular media, as well as most of the Dilophosaurus children's toys advertise at least one or both of these aspects. Some even leave out the dinosaur's striking double-crests. In reality, however, the spitting ability was only made up by Michael Crichton', while adding the frill was Steven Spielberg's idea. Real Dilophosaurus possessed neither of these traits, with the twin crests and its thin jaws (the latter of which isn't very evident in the movie's design) being its real discerning features.
Dr. Malcolm's quip that Sattler's and Grant's jobs are extinct is quoted from what puppeteer Phil Tippett said to Steven Spielberg when he decided to use CGI and not Go-Motion. Spielberg stuck it into the film.
Sam Neill injured his hand lighting the flare he uses to distract the Tyrannosaur. According to Neill, "It dropped some burning phosphorous on me and got under my watch and took a chunk of my arm out."
There are only 15 minutes of actual dinosaur footage in the film: 9 minutes are Stan Winston's animatronics, 6 minutes of it is ILM's CGI.
Steven Spielberg was in the very early stages of pre-production for the film "ER" (based on a Michael Crichton novel), when he heard about the "Jurassic Park" book. He subsequently dumped what he was doing to make the film. Afterwards, he returned to "ER" and helped develop it into a hit TV series (ER (1994)).|