Movie: Sunshine (2007)

In the movie “Sunshine” by Danny Boyle [IMDB] there is a scene which is impossible to comprehend unless you have some knowledge of physics. The protagonist Robert Capa (Cillian Murphy) finds himself trapped in an airlock from which he must escape at any cost. The airlock contains a space suit, and has one outer hatch towards space, and one inner hatch towards the interior of the spaceship, which is locked.