You are right, David, I was referring to the moment just before the Hulk leapt up to the paraphet just before he jumped down to the street. However, I do remember that look as you put it, and to me, he just didn't seem distracted, more like focusing on Thor as Thor was getting up off of the floor. Maybe pausing for a moment to see what Thor would do next. As Pro said, Lou was very good at changing up his expression, and this was very subtle and quick. When Thor got up and extended his hand, the Hulk grew angry and defensive again.

I love that pic you put up, but I don't think it is of the moment, or "look" you are referring to. He still looks pretty ticked off to me!