(I work at a parts store where we sometimes get some people whose mechanical knowledge is less than what they think. One particular day I get this gem of a customer.)
Me: “Hello, sir! Welcome to [Parts Store]. How can I help you?”
Customer: “I bought your best most expensive brake pads a few months ago, and now they’re shot! I’d like a refund!”
Me: “Sir, with those brake pads you get a life time warranty. There’s no need for a refund; we’ll just give you a new set.”
Customer: “Why would I want a new set if they went bad in a few months?!”
(He continues to ream me for a solid ten minutes on the poor quality of the pads. At this point, he shows me the old pads. It is VERY obvious he had no idea what he was doing, and put the pads on upside down… Neither I, nor any of my coworkers, nor guys at a competitor parts store, can figure out how he managed to put the vehicle back together with them like that.)
Me: “Sir, I can’t refund these, nor can I give you a new set. The warranty doesn’t cover improper installation.”
Customer: *now red as a tomato* “WHAT DO YOU MEAN IMPROPER INSTALLATION?!” *he then calls me all sorts of names, none short of making fun of the fact that I have long hair* “Where is your manager?!”
Manager: “How can I help you today, sir?”
(The customer replays the story, even though my manager had no trouble hearing the encounter from his office.)
Manager: “Sir, we can’t replace these pads. They were obviously installed wrong. Our warranty does not cover improper installation.”
Customer: “How do you guys have jobs? These were installed by ME! I’m a mechanic, for Christ’s sake!”
Manager: “Hey [Coworker], can you come up here for a second? Tell me what’s wrong with these pads?”
Coworker: “Looks like they were installed upside down.” *walks back to the back of the store*
Customer: *yells some more obscenities, calls us all idiots, and storms out of the store*
(Another day on the job. Please treat the parts guys with some respect. We’re trying to help you, not make your life miserable!)