The usual trying to be cool works from Brian A. pretty much. I find it annoying and blah. There could have been a better way of doing this, a stronger way of showing Babs before the meat of the movie came about. What's interesting is that Bruce is ignoring her, maybe he feels uncomfortable about what happened. That's what I figure.
@numberthirty: Interesting, at a lot of Star Wars places you get the opposite happening. Had someone tell me "Hey did you know Luke is the Joker" during a screening of Star Wars VII.