What are the odds, right? Of all the places it could have landed, it hits some poor bloke in the head. Of course, I'm equally surprised that anything was left loose in the cabin of a helicopter, and that the door was open.
That is what I was wondering. My first thought, after "that HAD to hurt like heck and be very surprising" was: "The door was open? What is this? Vietnam? No one is shooting at you fellers. You don't need the door open to shoot back."