2001: A Space Odyssey is a cinematic masterpiece, and one element of its brilliance is its soundtrack. To me, it's less a film and more of an abstract musical; there's minimal dialogue, and the interplay between score, screen, and story drives the emotional dynamic of the film. The best example of this is the first seven minutes of the movie: it's sheer darkness, with the Bavarian Radio Orchestra's rendition of György Sándor Ligeti's haunting "Requiem for Soprano, Mezzo Soprano, Two Mixed Choirs, and Orchestra" playing, playing, playing, a most disturbing crescendo with no end in sight. Think it's not disturbing? Watch the movie at night with no lights on.In the theatre, it's downright terrifying.
And there's a surprise when the movement ends. I won't tell you what it is, but it's equally upsetting, especially if you've invested your feelings in the previous six minutes.
Listen To: "Requiem for Soprano, Mezzo Soprano, Two Mixed Choirs, and Orchestra"