She tried to get the flight attendants' attention, but noted they seemed "unconcerned" by the display.
It gets more bizarre.
The passenger then allegedly shouted at a man who boarded with a ukulele to "COME SIT WITH ME AND MAKE SOME MUSIC".
He also stole "4 mini bottles of wine from the cart" two hours into the flight. And, perhaps strangest of all, eventually became cold enough to put a thick winter jacket on — despite the fact that his pants remained off for the duration of the flight.
People on social media were appalled by the man's behaviour:
Lizzie noted that a flight attendant did give her the choice of moving to another seat, but as she'd paid for extra leg room she didn't want to.
She instead suggested the attendant to tell the man to put some pants on, but he merely "shrugged".
On the plus side, at least it brought the rest of the passengers together:
Always wear something more than underwear on your flights, ladies and gents. That goes without saying.