It's perhaps the most dramatic clumsy thing I've done, with people watching and not helping me! I was very very upset.
I was running for the bus and tripped on the sidewalk where a square of pavement was missing. My ankle was sprained so badly I was out of work for a week and not only could I not walk, but I couldn't even fit a shoe over my swollen foot, and it took months and months to heal.
edited to add: I was lying on the ground because I couldn't get up. I was crying. The bus driver was right there with the door open and did not help me, he ignored me. People walked by. Finally a nice couple walking past helped me up. I should have reported that bus driver, but I was too traumatized to take down the bus number, etc.
What's the most embarrasing / clumsy thing you've ever done on a date?