Some people go into shock pretty damn quick. I fell down a gnarly down flat down to the last down part, shattered the side of my pelvis and was bleeding internally, yet I was able to get up, ride down, and hit the rest of the rails on the way... It hurt beyond anything describable and looking back now I don't really know what I was doing... I guess my mind was somewhere else and I also just wanted to get my mind off the pain. It was gnarly.