When we as children first got a TV (tiny thing in black and white) we watched The Last Night of the Proms every year. My daft mother used to wait with baited breath for the fat lady she called 'Big Bertha' to be 'wheeled on' to sing Rule Britannia.
The introductory music would set her off giggling, and she'd laugh until she nearly burst when Big Bertha sang "This was the Cha-Tah". By the end ("Britons never never never..."etc) we were all sobbing with laughter, tears rolling down our faces.
Looking back, I can't quite understand why we laughed so much. I remember my stern father being nearly hysterical!