I had to do a search to see what you meant. What an eye-opener

It's not the first time it's happened but after sitting next to a larger-than-average man on a recent (short) flight and having to lean towards the window, my back actually hurt. Even though I can see it's been discussed ad nauseum elsewhere, I still think the single most irritating thing about flying anywhere is being squeezed next to someone who should have bought two seats but instead is invading part of mine.

That, and airline companies who don't do anything about it.