It was a route I drove basically any time I needed to go into town so autopilot is my best guess too. But I'm also not sure how much of me not remembering anything is caused by me not actually noticing anything durring the crash vs post adrenaline dump amnesia. Maybe the course of events that lead to the crash made perfect sense and I just can't remember any of it because of the adrenaline dump immediately after the crash.

But yeah not much point hyper analyzing it now. Besides any way you lay it out rearending someone is never not your fault. I screwed up, I just wish I knew in what way.