 When Williams first demonstrated his idea to Spielberg, playing just the two notes on a piano, Spielberg was said to have laughed, thinking that it was a joke.As Williams saw similarities between "Jaws" and pirate movies, at other points in the score he evoked "pirate music", which he called "primal, but fun and entertaining".The primal opening notes are developed from the opening foreboding tone of Ravel's La Valse.