I work in customer service of course, and we are required to ask customers if they need help finding stuff. Plenty of people say “no” in perfectly reasonable tones. Some customers say “yes” and actually mean it.
Then there are those “customers” who don’t want any human interaction at all, or are confused as to why and how they found themselves in a bookstore. They give sarcastic remarks instead of a simple “no.”
All of those interactions tend to stick with me a lot more than any of the normal or positive experiences. They don’t get my blood boiling like a truly awful customer does, but there is a pot on the stove slowly simmering on the back burner…