Un chien andalou
This French short film is highly regarded in many film history books. Spanish surrealist Luis Buñuel wrote his first feat together with Salvador Dalí, based on their dreams. The first official screening featured guests like Pablo Picasso and Jean Cocteau. Initially, the film was to be shown only on a limited basis, but it soon grew into a popular attraction, remaining on show at Paris’ Studio des Ursulines for eight months.
Don't get stuck on the plot; Buñuel deliberately omits chronology and opts for Freudian dream logic, in which scenes do not necessarily follow one another logically. Un chien andalou is by now a canonised work within surrealist cinema—a film-historical milestone that, at the time, opened the doors for Dali and Buñuel to join the ranks of surrealist André Breton.