My most recent one was last spring: I was behind a car waiting at a stop sign. The cross street was pretty busy and a house on the corner was located in a place that obstructed my view from the left. The car in front of me suddenly gunned his engine to pull out and cross the street. I pressed down on my right pedal, then clipped my left foot in. Suddenly I realized that the car had pulled out into traffic and was about to be smacked. I jammed on my brakes to put as much space between me and the carnage I was anticipating to view. I wasn't even moving more than 1 or 2 mph, but unfortunately when I stopped suddenly I was leaning too far to the right and wasn't able to get clipped out in time, so I fell over. Fortunately for the car in front of me the cross traffic came skidding to a stop and managed to avoid the collision. Unfortunately for me, the car in front of me threw his car in reverse and started backing up quickly to get out of the situation. I was laying on the ground still clipped in when I saw him backing up. I remember thinking, "I'm laying on the ground and he can't see me." I unsuccessfully attempted to crawl out of the way with my legs attached to the pedals. Lucky for me the driver stopped backing up a few feet before reaching where I was laying. Other than a couple small bruises from my tip-over I escaped unhurt.
My most memorable one was two winters ago: On my commute there is a portion where I have to exit the MUP by going down a steep embankment and cut across a field to get to the road. It was January and we had received a sizable snowfall the night before. As I went down the embankment the snow got deep enough that it abruptly stopped my bike. I went over the bars and landed flat on my back staring at the sky. The bike was still upright held in place by the snow drift. I had landed in soft snow so I was unhurt. I made a snow angel then got up and pushed my bike the rest of the way through the field.