My dad did a great one, many years ago. We were staying a couple of nights at a Disney hotel in Florida - we'd been staying at a friend's flat and had decided to do a short trip to DisneyWorld so had been stuck with whatever rooms we could get. Mum and Dad's room happened to be by the elevator which meant they'd got very little sleep as you could hear it go by every time it was used - a lot in a big hotel.
Dad had been down to reception to ask if they could move their room as they hadn't slept. The girl on reception had been really chirpy but said no, there weren't any rooms and that nobody else complained about the noise, implying dad must have been imagining it. As he walked away, she called after him 'Have a nice day' to which he replied 'that'll be bloody difficult'.
We got back to the hotel that evening to discover that not only had they been moved - at no extra charge - to a very nice suite, there was a very large gift hamper in the corner for us with lots of wine, chocolate and other goodies in to apologise for the bad night previously... Turns out there had been a problem with said elevator making it very noisy, which it wasn't usually but had been the night before and it was then out of service for the next couple of days while they fixed it.
I had one a few years back when I rang up to enquire about doing an MBA at the OU. Spoke to somebody male there who was very dismissive of my enquiry, spoke to me like I was an idiot, spent quite a while mansplaining how difficult it was to do post grad studies, how I needed to be older, have specific experience and be a male and that he thought I'd encounter lot of problems. Took great pleasure in waiting to hear him out, then replying that as I had already got one post grad degree I knew that I was more than capable of doing another, plus I had considerable experience as I was working at a consultancy so getting exposed to - and already working very successfully on - lots of top level problems and projects, having already done a big research project that had resulted in an overhaul of processes that had saved £££ and would save considerably more plus have a much higher success rate than previously...
There was a stunned silence at the other end of the phone and he then asked for my address to send the prospectus to
. Didn't end up doing the MBA but that idiot certainly didn't make me want to do it!