chunk: Quaid reaches the reactor control room, where Cohaagen is waiting with a bomb. During the ensuing struggle, Cohaagen triggers the bomb, but Quaid throws it away, blowing out one of the walls of the control room and causing an explosive decompression. While reaching for the reactor controls, Quaid knocks out Cohaagen, and he is sucked out onto the Martian surface, where he dies due to the lack of oxygen and pressure. Quaid manages to activate the reactor before he and Melina are also pulled out. The reactor releases air into the Martian atmosphere, saving Quaid, Melina and the rest of Mars' population. As humans walk onto the surface of the planet in its new atmosphere, Quaid momentarily pauses to wonder whether he is dreaming before turning to kiss Melina.