All it takes is crossing paths with one jacked up nitwit, one total narcissist, one sociopath or a out of control roid at the wrong time. Unfortunately there are way more than one of all those varieties roaming the streets. While the odds of running into one or more varies some with your location and your life style, the odds of it occurring are never gonna be at zero.

The odds of me winning the lottery are about 300 million to one, yet I still occasionally buy a ticket when there is a big jackpot.

My life and that of those around me is my ultimate jackpot.

And here is an excellent example I just found in the lounge
Sickening shooting case near my house