My most memorable oopsie was when I went out for a ride with Super-Amazing-Cyclist Woman. At the end of the ride, on the way back to our cars, she dropped me bad and ended up waiting for me by my car. As I come cruising into the parking lot, I realized that my cleat must be frozen to the pedal (this was New Year's Eve, and it was cold and started snowing shortly after the ride). Whatever it was, I could NOT unclip! So, I could either run into Super-Amazing-Cyclist Woman, or I could hit my own car. I choose the car. I jerked hard on the handlebar, bonked into my back bumper, and fell over. Finally, mid-fall, the cleat unclipped. She didn't laugh, but I'm sure she was laughing on the inside...I must have looked mighty funny.
Once I got home I realized that the handlebar jerk had broken my computer wire.