(Hot summer day temperature in the nineties. Tons of people in line because the shop is in an amusement park and everybody wants soft ice cream, which makes the soft ice even softer as it doesn’t have time to chill properly.)
Male customer, who bought soft ice cream for his family 30 min or so earlier, comes up to the window very upset: “The soft ice cream is melting! My kids are a total mess!”
Me: “Well, it is hot outside, what are you gonna do?”
Customer: “You should put up a sign to let people know that it will melt!”
Me: “I don’t assume my customers are idiots.”
(Customer bangs the ice cream cone on the counter and storms off.)
The next customer in line looks at me and laughs: “I’ll guess I’ll just have the regular ice cream then.”