Another satisfied customer!! LOL 
Ironically, back in 1997, I worked at a Radio Shack during the Christmas season and end of the year. I never melted, but one customer did, right before my eyes.
It was the first year those Sony Playstations had come out, and they required a "y-adaptor" which Sony forgot to include in most of the packages. Therefore, many who received the PS were unable to play with it on Christmas Day. Once the store opened, we were swamped with people needing y-adaptors, and they were pissed at us even though we didn't sell the Playstation. By lunchtime, there were only a few y-adaptors left. We moved them to a small box next to one of the cash registers.
One angry b***h came up to me at about 4:00 and said, "I need a GD y-adaptor because you incompetent a**holes didn't include them in the Playstation!!" I didn't bother correcting her, and I handed her one. I told her, "That will be $1.79, please." She screamed, "That's highway f***ing robbery!!! They're only $1.50 at Circuit City." She stormed out. About an hour or so later, she returned. Apparently Circuit City was out of them. By now, we were out as well. She walked up to the register (lucky me) and said, "Well, I guess you f***ing thieves win! I'll take that y-adaptor." I got an NSE (non-sexual erection) telling her that we were out. She then melted down completely, to the point the Store Manager ordered her to leave and never return. HAHAHAHAHAHAHAHAHA