Well, it had to happen some day. It's been an impressively long run - I've looked it up on the internet and it's actually a world record - but it seems I have, at last, got something wrong.

Sorry, I should made sure first that you were sitting down. Pick yourself up off the floor, pour yourself a stiff drink, and try to remember that we all live to have our illusions shattered. Oh, and put some clothes on, please - it's the middle of the afternoon.

The error (or ...