clip from Dark Star - . just saw this the other night. absolutely amazing.

classic Sci fi film. very low budget, loads of early synthesizers, brilliant models (which are more convincing than CG until very recently), some good acting (hit and miss though).
the astronauts are deep in space and on an old broken ship, the old captain died but his brain is still running in cryogenics, they are blowing up planets before they create supernovas. They've lost interest in alien life forms, and are all going a bit mad. it deals with boredom, apathy, drudging work, humanity in the context of a machine controlled existence, the meaning of life etc etc.

the scene here is the classic phenemology debate with a bomb insistant on exploding.

watch the full film!