If ever there was a movie about entropy it's Dark Star. Some of its creators refer to it as a version of Waiting for Godot but in space. It's not quite that, but it's close. It's a movie in which space travel has become so mundane and commonplace that the thrill of being among the stars is lacking from most of these astronauts. Their job in space is pretty thrilling really, exploding planets which seem unstable or pose some risk to potential colonizers. The creators imagined truck drivers in space, but these guys are more like bulldozer and crane operators. They plow the way forward and make the path smooth for those to come.
When we encounter them, they have been twenty years in space in Earth time but for these blokes only about three years have passed thanks to the mysteries of faster-than-light travel. They have blown up eighteen planets with intelligent talking bombs which trigger a chain reaction on the planet in question shattering it to smithereens. We see them drop "Bomb 19" and then speed out of the way of the result. After this momentary thrill the ennui of unchanging experience traps them once again inside their flawed personalities.