Speaking of missing pieces, what happened to the rest of my collar bone? I can see it in the X-ray, but when I look in the mirror it looks like it was stolen from my body by aliens straight from Invasion of the Body Snatchers. Hmmm. Maybe that's what happened between impact with the car and impact with the ground. Maybe aliens caught me in mid air, removed part my collar bone, and placed me back on the pavement flat on my back. Maybe they accidentally warped the aluminum frame of my bike while beaming us up into their flying saucer. And maybe the eyewitness was an alien who hung around just to make sure nobody else saw what really happened.
Or maybe I hit my head on the pavement harder than I thought :)