I'll try and confirm the details tonight but as I remember it someone dropped a BFG from the upper level of the Malls and it landed on someone below. Either way, coma, legal action etc. Messy business all round.
I honestly don't see how ANYONE could justify hitting someone in the head/face with one of those things as "all part of the game". I certainly don't consider potential brain damage as a risk worth taking when I go out to play.