I'm one of those riders that has no fear whatsoever of the ride...and the possible consequences for myself.
I ride, and I ride hard.
That said, there is one thing that does give me pause...rather brilliantly illustrated here...sheesh...I've written about stuff like this and it still makes me think.
This is about a 9 minute video...watch it all the way through. It's food for thought, and well worth your time.