I guess it was bound to happen sooner or later. I was turning left into my subdivision and had oncoming traffic - but it was quite a distance away. I was more concerned with the car coming out of the subdivision and whether or not they had seen me. As I started into the turn I realized that the oncoming traffic was moving a lot faster than I thought, which made me take the turn without braking. I went wide, got into a serious disagreement with the curb (curb won) did a half-gainer over the handlebars (9.5 from the French judge) landed on my back on the sidewalk and cracked the helmet clean through. The good news is, the bike only sustained minor scratches. I wasn't too bad off - considering. Any way - two weeks later and all my injuries are nearly healed. I'm riding a lot more cautiously these days.
Any similar stories out there?.