Last flight I was on November 2015, the guy next to me was rather large, not long after take off, the flight manager asked him if he would like to move to a whole row of 3 himself, thank god he said yes, I was in severe pain, nausea and pinned to side of plane.
The worse a full bus only one seat left next to me, omd he was about 6ft 7 and easily 20+ stone, he was sweating buckets, stunk like a wet dog, and stuffed his face snacks and drinks balanced on his belly. His mum and dad were also on the bus all I can say is enablers
By the way I admit to being large but *** there is a line you just should not cross,