And why, you may ask, is John Cleese, who has pots and pots of money, doing it?
Well, I suspect he has been offered so much money for a day's work that he couldn't turn it down ( or he's got a book/film to publicise).
So what is it?
Well, as the water pours down through the ceiling, his " daughter" says she will call the AA.
He replies," The AA? For faulty showers?"