Working in customer service is such a joy, isn't it? If you're not getting screamed at by customers one minute, you will be the next minute. It's one thing working at a store or a restaurant, but something about doing hospitality work brings out the worst in customers. It's their vacation, and if something goes wrong with it, boy howdy are they going to have a fit about it. TikToker James Mahoney caught one of these interactions in the act. A man verbally berated a motel concierge for his room…