Unfolded Physics on Instagram: "For Inception, director Christopher Nolan chose a practical solution instead of CGI for the zero-gravity hallway fight. A full-scale corridor was built inside a massive rotating rig and mounted on a motor. As the camera rolled, the entire set physically spun, meaning gravity constantly shifted while the actors walked, slid, and fought in real time. Joseph Gordon-Levitt performed most of the sequence himself, training extensively to move naturally as the hallway ro