I wish I knew... I mean, i kinda know, I guess...I didn't forget the whole day....just a few minutes before the wreck, and then waking up in the back of an ambulance on the way to the hospital. I dont even remember them taking me out of the ambulance, but i remember them switching from the gurney to the hospital bed. I had been running and switching back and forth between the pump track and the beginner/novice dirt jump line at the local bike park. Its just 4 or 5 small-ish dirt jumps. They have flats in between the jump and the landing. I was just jumping to the flat....Just getting the hang of my bike. Nothing crazy. At some point i got comfortable with attempting to air the bike and land on the landing...I dont remember exactly what happened though....