 The "Carousel" sequence is one of the most complex flying wire  stunts ever done for a motion picture. A circular rig was  constructed above the set, designed to rotate in sync with the  revolving floor plate below. Initially, the performers were all  supported by a single winch driving the mechanism for their thin  support cables. Unfortunately this resulted in the cables becoming  tangled during rehearsal; each stuntman had to be untangled and  brought down from the rig in a maintenance lift. The rig then had to  be redesigned so that each stuntman was on their own separate winch,  with all of the winches connected to a "panic" switch that cut the  power in the event of an emergency. For reversal shots, the white  crystal on the arena ceiling was built on the floor of the stage,  and the performers were lowered down towards it. These shots were  then filmed upside