Angry people got no reason to live

I just learned from the Facebooks that a friend of mine was accosted and nearly attacked at a bookstore by a nutcase who was angry at him for turning too slowly into the parking lot. The man was yelling that my friend's slow turn into the lot endangered his child's life. Not really sure how that would endanger anyone, but this guy had no problem leaving the child unattended in a hot car in the middle of a city while he tried to punch my friend in the back of the head for no reason.
A similar bizarre incident happened to me Sunday night while I walked to the Alamo Drafthouse theater's downtown location to see a screening of one of my favorite movies, John Cassavetes' The Killing of a Chinese Bookie. I was alone, walking down the street, minding my own business. I noticed a man walking five or six feet in front of me. His clothes fit him poorly, he walked in what can only be described as an aggressively apelike manner, and his skin had that particular red-dirt hue found only on young men who do physical outdoor farm work or hop trains and live on the streets. I made a mental note to keep my distance, but he began to turn around between every fourth or fifth step and glare directly at me with an unsettling mixture of hatred and pleasure. I readied myself. Best case scenario: he was going to ask me for money. Oh shit. I don't have any money. Maybe he wanted to give some insane spiel or manifesto. Most likely, he wants to start a fight for no reason. He started walking slower and slower. I passed him on the right. As I pass him, he turns to me and says, "What's your fucking problem?" I say, "I'm just walking," and keep going. Out of the corner of my eye, I see him take a swing at me. I turn back around, and his fist is about 6 inches from my head. A terrible swing, but a swing nevertheless. Then he takes two more airpunches in the direction of my head, but they're both too far away to connect. This guy is super nuts. He's trying to hit me, but also clearly trying not to hit me. What's his deal? Then he starts shouting at me and following me slowly for two blocks, calling me motherfucker, faggot, bitch, pussy, etc. I still don't know what set this guy off or what I would have done if his punches had connected or he had jumped me from behind. I was a foot taller than him, but he was pretty muscular and pretty insane, which is a scary combination.
Last week, a piece of shit punched a woman in the face and stole her purse in front of a bar my friends like to frequent. They caught him a few days ago, thanks to a sharp-eyed bouncer from a different bar.
Austin, what's with you this week? Get it together.