I would be interested to see what caused him to stop the attack. Gang rush? Cop? Martial Artist?
There was a similiar story out of Japan, I believe, like 3 years ago. Guy rented a truck and ran it into a crowd of people. Got out and started stabbing people with a kitchen knife. Killed a dozen or so and wounded another half dozen.
First cop on the scene draws his weapon and the guy gets right down on his stomach and is taken into custody.
More Guns = Less Crime
This bears repeating....