An overbooking resulting in a passenger being removed by the Chicago PD (not quite as heroic of action as shows up on those Chicago centric law and fire shows) from a United Flight.
I don't think even a Katie Nolan video can live that one down.
Not even one with Pandas.
In fairness, I've flown a lot and because of where I am, I usually fly United. I've never had any bad luck with United that was out of the ordinary for flying.