Anything you have seen while on the clock, your local store employee has probably seen a whole lot worse. Despite being largely underpaid, retail and service workers are some of the bravest members of our workforce, dealing with not only the classic ails of any job — an annoying boss, frustrating hours and bad shift scheduling — but all the entitled customers you’ve come to know and hate.

From decades-old returns to getting locked in the store overnight, here are 20 work horror stories as told by retail employees.