An American Airlines passenger, dubbed a Karen on reddit, demanded that a passenger assigned to a window seat move so that her child could have it, became extremely abusive. The woman threatened to sue the airline, and to sue the passenger at the window, when he wouldn’t move.
Finally cabin crew gave into the woman’s demands, accommodating her insistence on the window seat for her kid – by upgrading the passenger who had the window seat to business class. That incensed passenger Karen even more.