Happiness, Happiness, the greatest gift that I posses, I thank the Lord that I've been blessed, with more than my share of Happiness....

And it took me a few years to realise he was tempting fate, with that song. And he got away with it. His trick was never to nod a wink about it. A lot of his humour was obvious, but he knew subtlety. I would say that would make it his best joke.