Salvador Dalí was shown". Both of these films, "Un Chien Andalou" and "L'Age d'Or", have had a tremendous impact on the independent surrealist film movement. "If "Un Chien Andalou" stands as the supreme record of Surrealism's adventures into the realm of the unconscious, then "L'Âge d'Or" is perhaps the most trenchant and implacable expression of its revolutionary intent". Dalí worked with other famous filmmakers, such as Alfred Hitchcock. The most well-known of his film projects is probably the dream sequence in Hitchcock's "Spellbound", which delves into themes of psychoanalysis. Hitchcock needed a dreamlike quality to his film, which dealt with the idea
Un Chien Andalou defined Surrealism as "Psychic Automatism", unconscious, capable of returning to the mind its true functions, beyond any form of control by reason, morality or aesthetics." The film was financed by Buñuel's mother, and shot in Le Havre and Paris at the Billancourt Studios over a period of 10 days in March 1928. It is a black and white, 35mm, silent film, with a running time of 17 minutes, although some sources state 24 minutes, and a physical length of 430 meters. For many years (and still), published and unpublished reports have circulated that Buñuel had used a dead pig's eye,