The document discusses the use of an "enigma code" in film openings. Specifically, it explains that an enigma code poses an unanswered question to the audience at the beginning of a film that remains mysterious for most of the movie. It then provides an analysis of the opening sequence of the film Se7en, noting that tight close-ups of a man's hands leave the audience wondering who he is and what he is doing, setting up the film's enigma code.