I ride a lot and have gone 45-50 mph down hill, a big hill and it freaks me out every time since my field a vision narrows and I know that if i hit a pot hole, a pebble, a snake or a black bear that I am a dead man.
Then, pray tell, why do you do such a stupid thing?
I actually had a bicyclist pass me on a downhill stretch of twisty mountain road...of course, I was driving a VW bus, so I guess that makes me fair game to everyone.