For a TV programme about the film Casablanca Kren was supposed to read three letters that Groucho Marx had written to the Warner Bros. These letters were about the Marx Brothers´ use of the title in their own film called A Night in Casablanca, as a result of which legal measures were being threatened by Warner Bros. The filmed material of Kren was no use to the production and should have been destroyed. Kren got hold of the material and presents it, uncut including all of its repetitions.
(Hans Scheugl: "Die Filme. Eine kommentierte Filmographie," in: (ed.) Scheugl Ex Underground Kurt Kren. Seine Filme, Vienna 1996)