My routine drive home from work was a little less routine today. I finished my work a little after 3 pm, 48 miles from (and 2.6 miles above) home. Started down the hill, and wound up right behind another vehicle that was heading to the same office as me in town. At the intersection with Saddle Road, they were a little way ahead of me, and managed to pull out in front of a couple pickup trucks, which I then wound up behind. It was drizzly and foggy, and Saddle Road is narrow, winding and sometimes steep, so nobody was eager to exceed the speed limit by much. Within a few miles, we had caught up with another truck, and a couple other vehicles weren't far behind me. After milepost 22 (counting down to 0 in Hilo), there's a curve to the right, a short uphill, curve to the left, downhill, curve to the right, uphill, curve to the left, downhill. I came up the first hill, curved to the left, and as I went downhill and around the curve to the right, noticed the vehicl