Imagine you're a Hollywood studio executive.
A director walks in with a pitch, his eyes delirious with excitement. A western, he says. A cartoon. No, not 3D. Just Johnny Depp and a host of other unlikely lads and lasses to play the characters. The lead character being...a chameleon. Family friendly, good for both the kids and the parents. But not condescending or patronising to either audience.
As the tottering pile of improbables mounts, your mind reaches the inescapable conclusion: Impossible.
And quite right, too. Except, somehow, Gore Verbinski and his merry men (sorry, merry persons) have contrived to do just that and created the best movie I've seen this year: Rango.