I'm sitting down in the aisle seat when a "fratty" guy who has the window seat asks the woman in the middle seat to move up one row so his "crazy" buddy can sit there instead. "Trust me," he says to the woman in the seat in front of me, "you will not want to sit near him." I expect them to be drinking the whole flight, as rowdy as can be. What happens instead? They spend the whole flight quizzing each other on orthopedic surgery questions.