I've helped pick up a face-planted rider before. Not pretty.

He was all out of it and saying "I'm ok, I'm ok" when quite clearly he wasn't. We sat him down, kept him still and called for help. Basically we refused to leave and kept telling him he was dazed etc and had been in a bad accident.

He made a great recovery and invited us (I was riding with a friend) to dinner to say thank you. Haven't seen him riding since...