He was at the bottom of a roller section when it happened. The Place is Rocky Hill Ranch outside of Austin and the run is called the Wall. It is about a 15 foot gully that you ride down and then back out the other side like a roller coaster drop and climb. He was probably going 20+ mph by the time he got to the bottom and then this happened. The surface is smooth dirt in that section, in fact it's the smoothest part of the run. He just missed a tree and the top tube probably would have impaled him but the front tire collapsed and he hit that and went over the bike forward before the tube could stab him. It was my wheel, we had been trading bikes to see how each others bike rode with different wheels and suspension settings. I have the exact same bike, except mine is in one piece!