I raced dirt bikes competitively, in enduros, for four or five years as a kid. Rode a road bike for a few years in my early twenties back and forth across the US. I got back on bikes in 2005 and ride regularly year round. Lots of bumps and bruises dumping dirt bikes. Nothing major. A few summers ago I attempted to take my 650 Dakar over Kingston Peak with a bunch of the yahoos that live on this site (yahoos much more capable than me). Fractured a couple of metatarsals in my right foot and a small fracture in my left arm. No big deal. I was off the bikes for a month or two. In 2002 I was sliding down a hill in a cardboard box at Copper Mountain. Broken back, damaged spinal cord, punctured lung, torn aorta, dislocated leg and severed nerve to my left vocal cord. Out of work for a year. My conclusion. Stay out of cardboard boxes and dont ride where you dont belong with this talented bunch of yahoos and you will be okay.