Upside down you're turning me
When I was working for a TV equipment manufacturer, one of the image processing scientists had a film clip that they used for image quality testing. To decouple the image from reality, this was turned upside down. One Friday we went down to his office to see if he was coming to the pub. He wasn't around, but this clip was playing on a rather expensive, broadcast quality monitor. We decided to fix this by turning the monitor upside-down (hard work, those things were heavy). When he reappeared, it took him a couple of minutes to spot what we had done. We all had a laugh, and then turned the monitor back over. Then we realised that the screen had become magnetised, and there were nasty colour fringes everywhere. A couple of degausses helped, but didn't cure it.
What was to be done? We went to the pub. When we came back the monitor had settled, and we were all very relieved.