when i 'm in coach i always get the middle seat between two ginormous bruisers with space issues , and in front of me , without fail , is a tiny old lady whose feet do n't even touch the ground but she has to put her seat back as far as humanly possible , getting a nearly sexual thrill as she hears it crunch against my knees , tilting back far enough so that i can spend the entire flight looking for dandruff flakes in her scalp .