I end up on my back. I completed the roll over into a skiing position, but
it was fairly obvious to me that I'd hurt the knee again, so I didn't try to
get up immediately. After a bit of contemplation, I skied down to the first
aid on one ski, got a bag of ice and some ibuprofen, and got the friend I was
skiing with to drive me home. Don't try this at home, it's not fun.