The only times I can remember recently would be last winter, which was my first in Seattle and I had never ridden in ice or snow before, so needless to say I ate the proverbial **** quite a bit.
Other than that, there was this one time I was leaving work at midnight, I had gotten about a block away and was making a right turn, as I was turning I stood up to mash up the hill and thats when my pedal snapped off the spindle. Now mind you this street I was turning on (the Pine st corridor) is where all the hipsters in Seattle converge on the weekends and the streets were packed. When I went down it was right in the midle of a crosswalk and as I tried to get back up, the pedal was still strapped to my foot and I slid out and landed right back on my ass and everyone walking around me was laughing at me