I really like your scenes in general, especially for the expressions. This scene is hard to enjoy, because of the performance. I really got quiete a strong machine, but even when i turn off the other people, i dont get more the 30 frames (already using ssw). Is there something you can do, to improve the performance?
Other than that you can try to disable Soft Body Physics or disable the male in the car if you have nothing to do with him. These should give you a little bit of extra performance.