I was messing with the raise/lower levels for the two prison storage controls so that once you take the elevator up, the far right one is barely showing. When I did the climb down animation on the far right edge, instead of Rook falling to his death, he warped to the storage controls area below, climbed up in about the same place he would have climbed down the edge and gets stuck at the control level with no way to get the elevator back down. It autosaves at that point, so I was forced to start a new game.