I know the scene you mean, yes there wasn't a constant of flying debris, I guess I liked how each scene seemed to incorporate the 3-D, from subtle to in-your-face, almost everywhere.
Enjoyed hearing your thoughts, I wonder if some theatres are better for 3-D than others? It would stand to reason the answer is yes. And that there's an optimum viewing distance for it too ... (I'll google it later to satisfy my curiosity lol)!!!