Deep down in our genetic construction, we're all contrarians - it's our nature. Somebody tells you what to do, you immediately feel like doing the opposite. A dictatorship instructs you on how to live, a rebellion rises. A teacher informs a class of 8 year olds not to play with matches, a contingent of those kids will do just that. To blame the now elderly Mrs Summersworth for Vincent's subsequent 25 year reign of arson attacks would be a tad unfair. But it makes you think.