This just goes to show that those with crappy jobs are in higher risk of being injured or killed.
But I still think John had involvement in his own demise. I mean, think about it, John had a job in which everyone sh*t on him everyday. You just can't have a job like that without an enormous amount of animosity building up. Sooner or later John was going to flip out and strike back.
Somebody should have seen this coming.