The American DVD for the movie arguably implies two false story-elements. First, the banknotes seen on it are USA bills but the picture is a Canadian production with Canadian notes seen in the movie. Second, three characters are dressed in black-and-white gangster-like garb implying a kind of Reservoir Dogs (1992) gang which the movie clearly does not have.
This movie was made and released about ten years after its source novel "Tænk på et tal" (which translates into English as "Think of a Number") by author Anders Bodelsen was first published in 1968. The film was made about nine years after the first filmed version of that novel, Tænk på et tal (1969) was made and released in 1969. This picture is the second and final (to date, April 2012) version of this novel.
Some movie posters for the film featured a text preamble that read: "A masterpiece of cunning and suspense . . . In a web of mounting tension, a beautiful girl is trapped and torn between two lovers, climaxing in a scene more terrifying than a nightmare! A chilling story interwoven with comedy... sex... terror!".
The bank robbery plot appears to have been taken from the film L'Etrange Monsieur Steve (1957) or the novel upon which the 1957 film was based, La Revanche des Mediocres by the film's writer, Marcel-Georges Pretre.
The trivia items below may give away important plot points.
The film was controversial for its grisly murder involving the jagged edge of a glass aquarium. This sequence has been said to be one of the most graphically violent scenes in a Canadian movie and contributed to the pictures various 18+ censorship classifications around the world.