Having bumped my knee when I fell, I knew there'd be a mark; sure enough, I found it:
Well, I am grateful that there were no further injuries, no sprains, and no blood drawn. I'm also thankful for the nice person who asked if I was okay and proceeded to joke a bit about it to make me feel less embarrassed. So much for wearing flats. From tomorrow, it's going to be my trusty Jack Purcells -- at least until I can find a more professional-looking alternative. I just don't want to join the slacks-and-running-shoes club. But, ah, the perils of public transport may have their way with my fashion points after all...