I've been knocked unconcious while playing wing (the opposing fullback tried to clear the ball over my head, but didn't get all the way under it). I've also dislocated a shoulder playing halfback (weird collision with opposing player), and I've broken fingers playing goalie. Is it any wonder I gave it all up to dedicate time to my bike? Oh, and I didn't mention the numerous sprains, either.

I wish your friend well. That's a mighty scary injury, and worse than anything that ever happened to me.