Director: Luis Buñuel
Sixteen minutes was all that Spanish provocateur Luis Buñuel needed to freak audiences out. In his notorious short film Un Chien Andalou, Buñuel disregards such things as logic and plot to simply rattle viewers' senses with a barrage of unrelated but uniformly scarring imagery.
The opening scene, for instance, shows a guy (played by the director himself) slicing a woman's eyeball open with a razor in a close-up shot that's intercut with the sight of a cloud shrouding a moon. Later, pianos are seen containing the rotting corpses of donkeys and tablets with the Ten Commandments etched onto them. What does it all mean? Fuck if we know. But we dare you to stop thinking about Un Chien Andalou after giving it a look.