I've been riding motorcycles since I was able to. After 35+ years, seeing friends hurt or killed, and a lot of near hits, you learn to improve your technique and expect the unexpected. I just started diving again after a long hiatus, and am learning with every dive how much I don't know. What is common to both, and a host of other hobbies/lifestyles, is to do everything you can to manage the risks involved. How each of us does that is a personal thing, but certainly you cannot remove all the risk from everything, everyday. People always quote the chances of getting hit by lightening as having a low probability factor. Yet very frequently people are hit by lightening. So as long as you have to face risk, you may as well face it doing what you love to do, and hopefully the pleasure of the experience outweighs the anxiety of the risk. When the perceived risk outweighs the reward, it's time to quite. jmho/ycrmv