Israeli man accelerates into hospital with car key in skull

This occurred during a brawl? Here in America when we brawl people get injured by things like fists, guns and knives, sometimes broken bottles. You'd think in Jerusalem, with such a large portion of the population being military trained and prepared at all times for a terrorist attack, they could muster something deadlier than a car key.

Was it his key? If so, how did his opponent disarm him? If not, how did the other guy get home? Plus, how do you go about getting your keys back under those circumstances?

Really, this article raised far more questions than it answered.