Many, including Jackson biographer Steve Knopper, have speculated that Jackson's "Billie Jean" costuming and choreography were specifically inspired by a dance routine performed by Bob Fosse in the 1974 musical film "The Little Prince". In that film, Fosse, playing "The Snake", sings the song "A Snake in the Grass" and performs an accompanying dance that Fosse himself choreographed. The dance includes a variety of techniques that seemed to be echoed in Jackson's routine, including trademark Fosse elements such as hip thrusts, bent knees, shoulder isolations, jazz hands and kicks, as well a brief moonwalk. Jackson openly acknowledged Fosse as a dance influence, having told Fosse himself that he had amassed a complete home collection of Fosse's choreography work in film and television, which he watched frequently. However, Jackson never specifically cited the "Snake in the Grass" routine as an inspiration.