Had it been written as a scene in TV satire The Windsors, it would have been hailed as a piece of comedy genius.
Princess Beatrice, however, proved some royals are beyond parody after she cut singer Ed Sheeran's face with a ceremonial sword while pretending to knight pop star James Blunt at a dinner party.
The bizarre story, and Sheeran's injury, came to light after he posed for pictures with fans the day after, showing he was only about 5cm away from having his eye poked out. He had to have stitches in his cheek after the blade slashed a 5cm vertical gash underneath his right eye.
Beatrice's behaviour is unlikely to help her father, the Duke of York, in his bid to persuade the Prince of Wales his daughters should be given more prominent public roles.
Buckingham Palace refused to comment or engage in any discussions about it yesterday.