Sitting in twentysomething A yesterday SFO-ORD on an overwater 772, I was behind an asian couple roughly my age (early thirties) and next to a man in his fifties who stood maybe 6'2" and weighed ~275#. Big guy. The second I get situated, I put on my noise canceling headset and start reading.

He orders a Choice(tm) sandwich and I take notice as he tosses the included mayo packet onto the gentleman in front of him. I am mortified as the victim turns around and offers it back to me. I shrug and motion over to my seat partner, who finds this hysterical and otherwise ignores the guy.

So, I have 2+ more hours next to this [jerk]. Worst behavior I've ever encountered from a passenger.