Its a pretty advanced ride, called Tortilla flatts, which is this long twisty ride down this mountain leading to a lake. I was a very new rider, and my buddy who was more experiences on that ride was hauling ass, and I was trying to keep up. Anyways, long story short, I hit gravel on the inside of a turn and lowsided into the mountain. Aside from my knee, I broke my helmet and got a LOT of road rash.