Oh I run into crap all the time.
In 2001 I had a job at a recumbent bicycle factory/shop. Right as I was about to step out for lunch, some fat lady entered the shop and started asking about five thousand questions. I have nothing against that, by definition. It's uncomfortable but alright I can have lunch a little later.
Except she was one of those people who really look down on people who work in shops. You know what they're like, they talk to you as if they're the Queen/King and you're a slave of some sort. It's ridiculous. So I was fed up and I yelled at her, more or less told her to get her fat ass out of my store so I could choke down a salad which, incidentally, I really thought she should give a try some time.
End of the day I had to drop some parcels off at the post office, I enter, who's behind the counter...
...the fat b*tch.
"Well well, look who we have here..."
I ran.