Numerous times skiing in the trees doing little airs, I hit flat spots and smacked my face into the ground. Only one concussion, and I wear a helmet now.
Worst was probably last spring at whistler, coming down from the peak I notice some freshies where its roped off, I see another guy go under the rope and ski down fine. There is sign saying caution cornice debris, but its flat light and everything looks white. So i was cruising until i put my right ski straight into a chunk of cornice and my knee turns around almost backwards from impact. I lay there for 5 minutes, cause it fucking hurt and I thought I had torn something for sure. Stand up and skied away fine. My knee has been bothering me since though, and I am going to get it checked out soon.