One really strange one was at Walgreens. A guy with a glock on his hip was arguing with the pharmacist about needing his "pain pills". The guy arguing put his hand on the butt of his weapon twice. It looked like habit or reflex. Never the less, it just had potential to go sideways.
Pain pills? I know that the police frown on carrying while drunk or high on pot.
I saw a very odd man who was open carrying in Walmart. He was Mexican-carrying a big, cheap copy of a 1911 and bent over like Groucho Marx. ...overbite, ears low on his head (well below eye level), long, messy hair. He was walking up toward people while staring at them, one after another, like a stray dog. Saw a couple of others who looked like run-of-the-mill tweakers.