From the OP:

Thanks for all the responses, everyone. I was unaware of how many of you have actually been involved in crashes.

What I guess I was looking for is as an inside scoop as to what was going on in your head before the crash, rather than the circumstances of the crash. Were you distracted? Daydreaming? Pre-occupied with a mechanical issue?

In another of my recent threadstarters, I explored my own thoughts and actions while driving a car down the same route that I ride to work, and I was alarmed to discover that I'm not always as alert as I expect drivers to be when I am on a bicycle. This is why I've become so hyper-sensitive to what's going through my mind when I'm in the bike lane. I see now that regardless of how super-careful I am when I'm riding a bike, people in their cars can make bad things happen just by losing focus or by slipping on the steering wheel for a split second.

That said, would those who have already commented care to describe their mental state immediately before the crash in no more than 4 or 5 words?