I think I'm a sucker for scenes for people/robots being brought back from certain death. More of my favorite scenes from "The Abyss."

A husband and wife are trapped in a underwater vehicle, miles under water at the bottom of the ocean. Their vehicle is damaged. Water is trickling in, slowly filling up the cabin. The husband has a diving suit. The wife does not.

Before the air goes out completely, the wife tells the husband that he's the better swimmer, and that if he can swim fast enough, she should be able to survive drowning and severe hypothermia, provided she can be resuscitated. The husband has to watch his wife freeze in the icy water and then suffocate, then swim a couple of hundred yards to the safety, only then to fight in an attempt to bring his wife back to life.

Part 1: http://www.youtube....atch?v=-fjS0ocT4FM (www.youtube.com)
Part 2: http://www.youtube....atch?v=8Q60x_5WOqk (www.youtube.com)

This scene is the embodiment of absolute desperation.