(I’m serving a customer at the register, with items well into a triple digit total. He’s staring at the price display like a hawk. Even though there’s no line, I’m scanning as fast as I can.)

Customer: “I think you charged me three bags.”

(I look and see that one of the two carrier bags he had had indeed scanned twice. I void the extra bag.)

Me: “Oops, sorry about that!”

Customer: “There really should be a training program for you people.”

Me: “I’ve been trained for this, sir.”

Customer: “Well sure as s*** doesn’t look like it. How hard could it possibly be to scan each item once and only once?”

Me: “It happens. I fixed it, as you can see from the display.”

Customer: “But you’ve wasted my time with your incompetence!”

(My manager is walking by, sees the commotion, and approaches.)

Customer: “You really should be fired. I don’t think it’s too much to f***ing ask for you people to do your jobs properly. Perhaps if you had paid attention in school and not fooled around all the time, you wouldn’t be doing this s*** now. Moron!”

Me: “I apologize for the error.”

Customer: “Well, that’s not really good enough, s***head! This happens every time! The only reason I don’t go to the other store across the street is because they’re even more f***ing idiotic over there!”

Me: “I’ve corrected the mistake now. You will only pay for the items you’re actually buying.”

Customer: “But how the f*** can I be sure of that now?! I only get the f***ing receipt after I’ve paid! I’m left trusting potheads and morons like you to handle this s*** properly, but I guess you can’t even do that! Un-f***ing-believable!”

(At this point, my manager comes over and speaks up.)

Manager: “You make an excellent point, sir. I will fire this employee immediately, and your purchases today are free of charge.”

Customer: “Really?!”

Manager: “No. F*** off!”

(With that, my manager closes my register and motions me to follow him. We leave for break, leaving the customer standing there, stunned.)