Some nights we have this one guy who comes in at around 11, shops for his groceries, then comes up to check out at 12:00AM on the dot. He's the kind of guest that will make you stop after each item has been scanned so that he can check to make sure the price is correct. If he doesn't like the price, he tries to say that it was marked lower. When we finally get him out of line he stands at the end of one of the check lanes and ties his bags shut really slowly, before leaving. By the time he leaves the store, it's usually 12:20-12:25AM.