Director Alfonso Cuaron's Gravity sends two astronauts (Sandra Bullock and George Clooney) orbiting in outer space without a vehicle. Their space suits are low on oxygen, and debris from an explosion flies toward them. We watch Clooney drift away, and then for the rest of the 90-minute film, the camera follows Bullock as she tries to find a way home. There are only a few scenes in which Bullock is not in zero gravity. In a second zero-gravity film, Writer/Director Gavin Hood's Ender's Game, a brilliant young teenager spends time weightless in a "battle room" learning how to lead a team that will fight a forthcoming alien invasion.
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