I've worked in far too many retail locations, and as a result I have far too many terrible stories of customers' bad behavior (e.g. leaving fresh feces in the changing rooms

) but here's one about asking me to do the impossible. I was working in a perfume/luxury goods sort of store, and a customer comes in with a grocery bag full of travel sized bottles of lotions, body washes, what have you. She comes up to me, and is very sweet and nice while she tells me that she just wants to return these as the scent just doesn't appeal to her. Smiling me dutifully starts pulling items out of the bag while she goes to look around, and this is when I realize that except for one aloe vera lotion, I have never seen any of this stuff before. I had been working in this store for about a year at this point, and our store specialized in selling fragrances that had been discontinued by the company I worked for; some of the fragrances we specialized in had been most popular in the '80s.
So, I hadn't seen any of these fragrances before, and while the customer is looking, I go get my manager because not only do I not recognize this as product we could have sold the woman, but it has been used (think crusties on the outside) until it was almost gone, some was so old it was discolored, and others had price tags on them that were not only *not* our price tags, they were so old they had turned yellow, and the glue had completely dried out. My manager takes one look at the woman and explains to me to let her handle it. Apparently, this woman had a habit of purchasing products from our store off of Ebay for a very small fee, and then coming back into our store to get a refund that was considerably more than what she was owed. Oh, the fragrances I didn't recognize? They had been discontinued in the mid-'70s

and after a smell-check, they were definitely past their shelf life.
My manager handled the woman really well, and even though the woman started yelling at me (why be sweet if you aren't getting your way, I guess) my manager somehow satisfied the woman enough to get her out of the store peacefully, then told me to not bother waiting on that customer should she be back in, just let the manager know she was there and go about my business.