ok, that last photo looking down, where you see colourful floor, that was a hard painted surface, from there inwards is what rotated, including the seats and stage, with the car trunk and tire (although now that i think about it i am not 100% sure the tire was included because of the mechanism that it travelled along once it went up into the air (from what I remember seeing under the stage) so the tire might have stayed put, all the side garbage stayed put as did the moon backdrop.
I just remember when i sat down all i could see was inside a trunk and thinking WTF
http://www.flickr.com/photos/27199361@N08/ Phantom at the Royal Empire Theatre