The first world problem of the day, people that don’t think.
The problem of today is people that are about to pay for their groceries at the same time as they talk on their phone. They are incapable of both talking and paying, and of course they always choose to let everyone else after them in line wait until they have finished their phone call before paying.
If you can’t do two things at the same time, then don’t do it. Or do one thing at a time. And let that one thing be what a normal human being would do! Think.