re: Has this situation like this ever happened to you while waiting in line at a store?

Irritating as hell. However, I would 100% NEVER pay for her order. She won in the end. Old baw who paid should have just given her an earful WITHOUT paying. You all should have.

Grocery store checkout is another place that is famous for divvying up a cart full of food and paying with half dozen different monies or cards. Aggravating. I avoid that now by pick up orders, a Covid leftover that had improved my life! Fresh fruit/veg/meat worth a farmers market and/or quick off-hour making groceries, but never again need to spend an hour in a store getting all the basics, then half hour checking out behind molasses slow people.