'I forgot how rare and intoxicating collective joy is. It revives the heart, a bit, doesn't it?' said Megan Cat-Noises on Twitter. I may be the only person in the country to have woken up depressed on Saturday morning. Perhaps it's just what collective joy does to me and I am therefore to be pitied. It's certainly the case that I deeply dislike spectacle of all kinds and the heavy symbolism it demands. Still, let me try and clarify a little my response to the Olympic opening ceremony.