Back in February I had a chance to talk with one of the crew members from Inception. Turns out that hallway fight scene was not CGI, they did that for real:
However, more interesting were his comments on Christopher Nolan (a bit chaotic in his shooting style), since he worked with him on Inception and The Dark Knight. He showed me a video of the rig they used for a hallway scene in the film, which was larger than a semi-truck’s trailer, that completely rotated. He went on to explain that they rubberized everything inside and painted it so the actors inside could roll around and fight. They also locked down a camera inside the hallway and used a camera crane that could go inside the moving rig. Evidently I’m one of the only guys outside of the film industry to see his little cell phone video of this rig.