Great question! First off, your fear is healthy. Mountain bikes can throw you really hard, and it's important to maintain a healthy fear of them. People who are fearless eventually have to stop riding, either because they're tired of being hurt all the time, or they're so hurt they can't ride anymore. Fear is good, so fearless people don't last long. You mentioned "old age," so I think it's worth mentioning something that most people won't tell you: If you're over the age of 30 and you haven't already mastered jumps, drops, manuals, and other tricks, you've missed the golden...