People are voting emotionally.

As somebody who had not heard any of this before, it became a curious phenomenon to sit and watch a film and slowly have the realities begin to click into place.

This is one of the few movies I've ever seen where the whole audience broke into spontaneous, loud applause a third of the way in.

Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.