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The zero-gravity hallway fight scenes were achieved by using "...massive, rotating sets that twisted and turned and forced Gordon-Levitt to maneuver with utmost caution. Five-hundred crew-members were involved in the scene, which took a full three weeks to complete." The sets were built in a London airplane hangar, including a horizontal hallway that rotated 360 degrees, a vertical one and a set with steel trolleys to which the actors were attached by wires (later erased using visual effects).