This may be the only time that I'm happy that I barely fit in coach seats. No part of me overhangs or anything, but being 6'1" and a large frame that fills the seat will leave very little space for any seriously obese person sitting next to me to interfere with my space. Haven't had the situation happen to me yet, but if it ever does, I'm not moving and if the other person was there first, they can either move their rolls or have me sit down on the overhanging parts of them with the armrest down.