A week or so back, there was a gameplay interview with the development team on the first real interaction between Elizabeth and Booker. They showed off aspects of her being which they painstakingly worked on to not happen inappropriately, incorrectly, etc. I had the thought that perhaps they had left some secret action for her if I brought her back to the start of the level. But when I took her back to the first maintenance room, her path finding bugged her really badly.

Just saying that when I first saw this, it was... interesting. She was twitching out and every three seconds her leg would do that.