When I’m trapped in a metal tube, trying my best to keep my limbs from inconveniencing anyone else around me, I find myself clinging to any small pleasure I can find, even if it’s just a cup of muddy coffee. Up here, the illusion of luxury might as well be actual luxury. Airplanes are a place of needle-thin margins, where an ounce of comfort for yourself can come at a steep cost to someone else. Only one true retreat remains: watching free movies.