Steven Spielberg's 1993 mega-hit rivals Jaws as the most intense and frightening film he'd ever made prior to Schindler's List, but it was also among his weakest stories. Based on Michael Crichton's novel about an island amusement park populated by cloned dinosaurs, the film works best as a thrill ride with none of the interesting human dynamics of Spielberg's Jaws. That lapse proves unfortunate, but there's no shortage of raw terror as a rampaging T-rex and nasty raptors try to make fast food out of the cast. The effects are still astonishing (despite the fact that the computer-generated technology has since been improved upon) and at times primeval, such as the sight of a herd of whatever-they-are scampering through a valley.