 The script lifts a scene from the screenplay of  _Superman (1978)_ (qv) that was not in the original theatrical  release of Superman but can be found in the new video and DVD  release, almost verbatim. Its the one where the hero  (Superman/Supersonic) enters the underground lair of the villain  (Lex Luthor/Dr. Gulik) and has to pass through some corridors where  he is shot, frozen, and burnt.