5. 'A Clockwork Orange'
Stanley Kubrick's A Clockwork Orange shocked audiences in 1971 with its scenes of rape and graphic violence, and time has done little to dull it. Many filmgoers that got into Kubrick after Dr. Strangelove and 2001: A Space Odyssey were horrified by the film, but it also won over a substantial cult very early on and many punk bands that emerged a few years later took some of their fashion sense from the movie. It's also played countless times on the midnight movie circuit and generations of college kids have put the poster on their wall.