"Mise en abyme" occurs in a text when there is a reduplication of images or concepts referring to the textual whole. "Mise en abyme" is a play of signifiers within a text, of sub-texts mirroring each other. This mirroring can attain a level where meaning may become unstable and, in this respect, may be seen as part of the process of deconstruction. The film-within-a-film, where a film contains a plot about the making of a movie, is an example of "mise en abyme". The film being made within the film refers, through its "mise en scène", to the real film being made. The spectator sees film equipment, stars getting ready for the take, crew sorting out the various directorial needs. The narrative of the film within the film may directly reflect the one in the real film. An example is "La Nuit américaine" (1973) by François Truffaut.