Back in high school and college I worked for a local chain grocery store, since they were super good about making schedules around whenever students would be home for weekends/holidays. The particular location I was working at during college was open until midnight most nights, and while the flow of customers really slowed to a trickle after 10 pm, there were always those few who would pop in for their week of groceries at 11 pm or later, or even people trying to get in the exit doors after we closed. Typical stuff.
Tuesday nights, without fail, an older woman would shuffle into the store at 11:45 pm or later, and fill a shopping basket with baby food jars. It never failed to be midnight or later when she finally came up to the registers to cash out, which came to be an expected annoyance. To make things even more annoying, she would put the baby food jars on the belt one by one, and insisted they get scanned and bagged upright. She did not want them to even TOUCH the bottom belt that took them to the bagger, so either the cashier had to bag them one by one or carefully hand them to the bagger. If one tipped over or rolled on the belt, she would scold you and need to replace it. (And if you've ever handled baby food jars, you'll know they're almost round and roll/tip easily.)
I've dealt with customers with OCD or related disorders that make them particular about their orders, but she always seemed grumpy rather than needing the product to be handled this way for a reason. But of course, I don't know why she needed her order done this way, so over the weeks I saw her I had learned to avoid the scolding and just scan and bag her order how she wanted.
Our closing manager was a no-nonsense man who wanted to get the cashiers and customers out of there as soon after midnight as he could. He's super efficient, if a bit curt from time to time. One Tuesday night, baby food lady (BFL) was particularly late, and the last customer of the night. Closing manager (CM) had sent the bagger home already and bagged for me himself. As BFL is paying, I gently pass CM the baby food jars, and he starts just throwing them into a bag.
BFL: I don't want those tipped over! They need to be standing up! I don't want those now!
CM: (Still bagging) Ma'am, I stock these myself and they arrive upside down half the time. They've been tipped over before, they're fine. Have a good night.
And with that, he walks off to finish closing the store. Baby food lady looked a bit stunned, and left with her tipped over jars without any other arguing. I don't recall ever seeing her after that, but I rage quit that job later that year anyway.