It was on tiny wheels with a mount for the camera that put the lens about two feet above the ground. On it rode the camera operator and the assistant who changed the focus and that's all. Fred always wanted to keep the camera in as tight as possible, and they used to shoot with a 40 millimetre lens, which doesn't give you too much leeway. So every time Fred and Ginger moved toward us, the camera had to go back, and every time they went back, the camera went in. The head grip who was in charge of pushing this thing was a joy to watch. He would maintain a consistent distance, and when they were in the midst of a hectic dance that's quite a stunt.