Maybe they have seen it all before.
I was on the other side of the building taking photos of people's feet (not right yet; I'll post one when I've got what I want) when I heard the crunch. I didn't realise what it was, and it was only when I went to catch the bus 10 minutes later that I saw what had happened.
A while later a single ambulance rolled up, rather leisurely, so (as I would have expected) it seems there were no serious injuries in this minor accident.
A complementary viewpoint
features in the Images less lucky gallery today.
20061209 064.jpg [Posted 2006.12.09 to the Image by chance gallery.]
I cheated a little on this. I accidentally took it at f/10; but I didn't want the background sharp (as it was distracting), so I blurred it a little in post-processing.