On a second watch the film's immense technical achievements pop even more than the first time, somehow - and the psychological welly of it is certainly more crushing.

On that first point: there are some bravura set pieces, not least the incredible scene in Paju with the shifting light as the sun goes down, with flocks of birds wing-clacking in the distance, houselights gradually glimmering on the horizon, and three stoned people sounding each other out in the darkening penumbra;…

This film is a gift. I was expecting, at best, a smart superhero movie for young fans of that sort of thing - but this film is so much more than that. I think it's actually an important film: its message, that anybody can be the hero, runs completely counter to the proto-fascism of the horrific superhero drivel we see in other films, and is therefore radical and revolutionary. Its take on empowerment and identity politics seems to me to…