Springhealedjack
One of my most uncomfortable flights was on a BA 747 in economy at the very back where the tail starts to narrow, so just two seats with door and jump seat behind. I had to come back urgently on a family medical issue, and all was full up front. Unfortunately I was sat next to a young lady coming of a gap year who was pretty unwell, and I elected to sit on Jumps seat / walked most of the way back from Nairobi to give her some room !!