 The relationship between sound and silence is also taken advantage of in the way the audience is conditioned to associate the shark with its theme, which is exploited toward the film's climax when the shark suddenly appears with no musical introduction.Spielberg later said that without Williams's score the film would have been only half as successful, and according to Williams it jumpstarted his career.He had previously scored Spielberg's debut feature, "The Sugarland Express", and went on to collaborate with the director on almost all of his films.