An odd experience on the first leg of the flight from New York on Iceland Air. For the first hour or so, the gentleman in the seat directly behind me kept snorting like a pig. Rather loudly, once or twice a minute. Finally, after an hour of it, I turned squarely around and faced him. An otherwise professional presentation, but very impish-seeming. He gave a sort of gleeful smile and was silent the rest of the journey. Perhaps it was just his way of equalizing the pressure in his ears, but if so, it was a strange way of doing it.
From time to time, some Americans do that, in my experience. Someone who appears to be very civilized, but not in a serious manner, more the type of fellow you might think worked in a marketing department, will idly do something malicious, and sort of gleefully smile at it.
Peculiar. Not worthy of further thought, really, by anyone. Just noting the event.