process did not work. The bullet-time fight scene was filmed on the roof of Symantec Corporation building in Kent Street, opposite Sussex Street. Moss performed the shots featuring Trinity at the beginning of the film and all the wire stunts herself. The rooftop set that Trinity uses to escape from Agent Brown early in the film was left over from the production of Dark City, which has prompted comments due to the thematic similarities of the films. During the rehearsal of the lobby scene, in which Trinity runs on a wall, Moss injured her leg and was ultimately unable to film the shot in one take. She stated that she was under a lot of pressure at the time and was devastated when she realized that she would be unable to do it. The dojo set was built well before the actual filming. During the filming of these action sequences, there was significant physical contact between the actors, earning them bruises. Reeves's injury and his insufficient training with wires prior to filming meant he was unable to perform the triple kicks satisfactorily and became frustrated with himself, causing the scene to be postponed. The scene was shot successfully a few days later, with Reeves using only three takes. Yuen altered the choreography and made the actors pull their punches in the last sequence of the scene, creating a training feel. The filmmakers originally planned to shoot the subway scene in an actual subway station, but the complexity of the fight and related wire work required shooting the scene on a set. The set was built around an existing train storage facility, which had real train tracks. Filming the scene when Neo slammed Smith into the ceiling, Chad Stahelski, Reeves's stunt double, sustained several injuries, including broken ribs, knees, and a dislocated shoulder. Another stuntman was injured by a hydraulic puller during a shot in which Neo was slammed into a booth. The office building in which Smith interrogated Morpheus was a large set, and the outside view from inside the building was a large, three story high cyclorama. The helicopter was a full-scale light-weight mock-up suspended by a wire rope operated a tilting mechanism mounted to the studio roofbeams. The helicopter had a real minigun side-mounted to it, which was set to cycle at half its regular (3,000 rounds per min) firing rate. To prepare for the scene in which