I've met a lot of weird people in my life, some of whom I've talked in a little more detail about in different threads around here (notably, the "Autism you've witnessed IRL" thread) and sometimes it's difficult for me to dredge up the specifics due to both age and the volume of people I've known (I should also note that I've lived in a Southern area for most of my life where the general population tends to be made up of incredibly stupid people prone to very strange behaviors), but there's a couple of cases that have always stood out in my mind, both coming from the same local Books-A-Million store I've frequented here and there over the years.
One time, when a close friend and I were younger and browsing around the store, we spotted a guy all decked out in some funky, fantasy-looking getup, wearing a full on cloak over his head. Fairly lanky dude, had a full on beard. Myself and my friend had a little giggle about it from the distance, the guy seemed to have noticed, and uncomfortably shuffled away from the scene. We went behind him after he left to check out what section he was looking into, and it was a row of books about sex. Which made the two of us laugh even harder.
On another occasion, I had been looking around the store on my own, and this was about the time where manga was starting to become more mainstream among younger crowds, so they had a dedicated manga section set up near the back. I happened to move near it and a rather overpowering stench of fish, eggs, mayonnaise, and body odor struck me as soon as I got close enough. With morbid curiosity, I decided to peer down the aisle and I spotted a somewhat stocky teenaged boy sitting, cross-legged, on the floor, manga plopped open on his lap, a stack of manga at his side, holding what looked like an egg/tuna salad sandwich in one hand and a little juice box next to him, wearing a rather brightly colored polo, cargo shorts, and naught but a pair of flipflops on his bare feet.
Neither of these people were really being particularly disruptive or anything, but their quiet, almost picturesque examples of visual autism just kind of managed to stick with me.
EDIT: Oh, I just thought of a somewhat recent one from maybe about 3 years ago, before all the COVID shit stopped me from being able to see things like this happen regularly.
Family and I went to IHOP to grab lunch one afternoon and, right across from us, a single, lanky-looking, nerdy dude was seated at a booth, and what he decided to have as his meal that day seemed to be IHOP's "unlimited pancake" deal and, boy, it made for a peculiar sight watching him go through those things. The guy was just so... Methodical and meticulous about his every movement. He neglected to use any butter, syrup, or even utensils for his pancakes, choosing instead to take each one, one by one, and slowly fold them into wraps, then mechanically chomp them away, slowly but surely like that, only occasionally taking sips of what I assume must've been Coke. He got about 3 plates of full stacks deep before he finally decided to order a few strips of bacon to go with his meal... While continuing to have more plates of pancakes brought out to him. I think we finished up our own meal, paid our tab, and left before he was done, but I think I saw him starting on plate number 6 as we were leaving.
