Alright what you don't understand is that most of the time hitting rocks means hitting them with your skis and then tomahawking down the rest of the mountain, most of which is done by hitting snow, sometimes going off of a second or third cliff can be pretty bad, and or hitting another rock patch. Majority of the time your landing in a pow field. But then again there are those accidents. However I've seen plenty of people knocked out cold from rails and jumps so I really think they are different kinds of injuries.
From experience face planting a rail and wreaking on an icy jump can hurt pretty bad (ER'ed), I've hit rocks they hurt too (sledded off the hill) but the worst experience for me was hitting a tree (ER'ed). Tree's are solid wont move when you hit them and your not skimming or scrapping over it.. your colliding with it and damn do they fuck you up.
