Replying to Broken face skiing

this past week i was tryin a lincoln off a small cliff, and i came around to my feet and when i landed my skis didnt sink and my knee hit my face...i dont remember it at all because i got knocked out for a couple minutes, but my buddy told me how it happened. but i ended smashing a bone in my face into my sinus, and i was wondering how often this happens to people on here? or if you know anybody who it has happened to. people keep asking me if i was wearing a helmet, but it wouldn't have helped in this situation. is this very common?