Monty Python's Olympics for the Disabled was a cracker - swimming for non swimmers, Marathon for the incontinent etc also their Football match of villains vs philosophers where it takes Socrates several minutes to contemplate the kick off. BTW, Spamalot is a cracker.
Harry Enfields on a plane one was good and I think it was him that did the Arsenal team of the 1930's vs Liverpool of today which was good as well.
didn't he score with a diving header once he figured it out?!