My only collision in 28 years of riding occurred a little over a year ago on King St. in SF, right after the end of 280. It was a classic "mind the gap" crash - I was about 4 cars back from the light when it turned green, and as traffic started moving, an empty spot appeared. But I didn't scoot far enough into the lane after coming alongside it, and a woman merged right into me.
I had my high beams and a hi-viz vest on - visibility-wise, there wasn't much else I could have done.
Fortunately, (a) I didn't go down and (2) I took out her mirror and (iii) I left a huge dent in her door. We both stopped and I basically said, "WTF?" (politely). Her response, and I'm not making this up, was: "I had my blinker on, didn't you see me??" It didn't occur to me until much later to point out (politely) that YOU STILL HAVE TO FUCKING LOOK.
Anyway, let this be yet another cautionary tale: mind the gap!
As for the aftermath, there was none. My bike and I sustained zero damage, and although she took a photo of my license (I couldn't find my insurance card at that instant), I never heard from her or her insurance company - presumably she just ate the cost of the repairs, since she was, IMHO, completely at fault.