 _Star Wars (1977)_ (qv) footage was not all that was "borrowed" from  Western movies for this film. Popular movie soundtracks were also  used, such as _Raiders of the Lost Ark (1981)_ (qv) (used throughout  the film), _Moonraker (1979)_ (qv), _Flash Gordon (1980)_ (qv),  _Planet of the Apes (1968)_ (qv), and _Black Hole, The (1979)_ (qv).