Not nearly as tragic, but somewhat related. A couple weeks ago, one of my buddies from work was riding (road) near Roxborough. Some guy in an old beat up pickup, ran him off the road, pulled over a hundred or so yards down the road, exited the truck, and began making a mockery of my friend. When my buddy came to (thinks he may have lost consciousness), he tried to chase down the guy on foot, and was able to get a plate, but police said it was invalid. Moral of the story, be safe out there.