Descending a windy hill, a very long hill, not knowing what was behind me. Sustained speed was such that I could not hug the shoulder and take my eyes off the road. Wind noise was incredibly loud as well. I never unnecessarily ride in the roadway but this time I had no choice. A few cars did pass me before it got scary, so I assumed there was more to come. It was more than 5 miles and luckily no cars came. Never took that route again. Scariest? Hit & run, hospitalized 8+ months in '17.