Was playing in a tournament and we were between games, I was sat between two pitches with my back to one of the games chatting. First thing I saw was the ball appear in front of me from behind, then the two players that were battling for the ball as it went out for a throwing went straight through the back of me.
Came around as I was being loaded into the ambulance - Broken bone in my back + ambulance bouncing it's way out of a field was not a fun I can tell you.
I like to claim it as a football injury