In entrusting Winston with building characters that would be, in many respects, the stars of his movie, Spielberg, too, was taking a leap of faith. For JAWS, he had managed to build a movie around the malfunctioning mechanical shark, using John Williams’ music, clever editing and any number of camera tricks to suggest a shark presence that was not there. Such cinematic hocus-pocus would not rescue Jurassic Park, should Winston’s dinosaurs fail. For the movie to succeed, those dinosaurs would have to be completely convincing as living, breathing, organic animals.