There was a full sized van pulled off on the side of the road several hundred feet in front of me. As I got closer, it decided to pull a u-turn, taking up the whole road. I'm not sure why it stopped, but it stopped with about 4 ft of road left on the far left. I'm not sure what he saw as I shot past.

Also on a road bike, coming down the back side of Big Mountain, there's was a blind hairpin turn. I decided that I didn't want to wait for the car in front of me to negotiate it, so I passed it on the left. Only to see a car coming the opposite way. I went between both cars on the double yellow. Incredibly stupid decision.