There was a dome about 50-100ft outside of Root Society that was controlled by a gerbil ball with presumably a Wii controller in it. As the ball was passed around the dome, it triggered various sensors that contributed to visual and aural shifts. Does anybody know what I am talking about?
Not the pyrosphere. This was a bit more hidden. I wish I could remember what direction is was in but I think it was past Root, on the way to the deep playa.