Glad to hear that you're healing up well. I live on a similarly hilly area up on a plateau with 9%-12% grade roads my only option for getting up and down. I sometimes have thoughts about that kind of mishap while descending the hills. Since I live in a heavily trafficed area too, I also followup my thoughts with, "if I go down, I hope no one runs me over at 45MPH", as I take the middle of the right hand lane at those speeds and there are normally cars stacked behind me. Admittedly, I don't attempt those descents when it's wet or inclimate. I usually chicken out and transport my bike to the bottom, park in the parking lot of the shopping center at the base and start and end my ride there. That said, I think your accident could have happened even under the best of weather conditions and could happen to me too rain or shine. I'm glad your helmet saved you from head injuries. Get well soon.