I'm I traveled with a fat coworker a month ago, we had the bulkhead, I couldn't change my seat because they were in the "premium" economy section (oxymoron, airlines... oxymoron) and the rest of the premium seats were full. It was suddenly all worth it when he went to sit down and got stuck before reaching the cushion and had to push himself down! Then he couldn't buckle his seatbelt but couldn't handle having to ask for the extender, so he breathed in and forced it to buckle. My spine was twisted for three hours, but I felt like I was being treated to a show about life while obese...