I had the misfortune to have to take a 12 hour flight last week. I say misfortune because I ended up sitting by the window with 2 people to my left, slap bang in the middle of the back part of economy. With my slight case of claustrophobia, large (but not fat) frame and inability to sit still for any length of time - even on a sofa - this was not good. I ended up standing at the back for large chunks of the flight I could feel myself getting more and more worked up.
I usually do the online checkin 24 hours before but this time I couldn't do it, so that's what I was left with.
Peo