You learn amazing stuff while dropping down steep hills through sharp corners over big rocks. The first year I started mountain bike riding, it was not unusual for me to do three complete endos (front of the bike down, back of the bike going forward over your head) per ride. Flip yourself over on a stone wall a few times, and you begin to ask why it’s happening. Get enough answers, and riding starts to look like a series of life lessons. Article: 10 Lessons I Learned on a Mountain Bike