It's very enigmatic because of course, the population [of North Korea] has no contact with the world outside or it's very, very limited. They don't have any telephone connections, no radio, no TV, no movies, no newspapers - nothing from the outside world. This is very strange and there's the very strict, unifying government that forces you to be in step. You see it in the stadium where the spectators create, by flipping cards, an image of the dear leader, or of the volcano, and it's made of a 100,000 human pictures.

The paintings are not just on flat walls - you have these enormous niches, bulges and protrusions, as well as stalactites and stalagmites. The effect of the three-dimensionality is phenomenal. It's a real drama which the artists of the time understood, and they used it for the drama of their paintings.

When we speak about trespassing, we speak about artistic trespassing. You have to be prudent and have common sense and a sense of responsibility when you're trespassing. I think you haven't seen a film on volcanoes like that before. It's not National Geographic. It is wildly imaginative and very poetic and has a sense of awe that you normally do not see in films.

You should bear in mind that almost all my documentaries are feature films in disguise.

I don't see poetry as something that has to do with too much emotion anyway. It has to do with language.

I think psychology and self-reflection is one of the major catastrophes of the twentieth century.

There's happens to be a volcano in the vicinity and there's some talk about a volcano as well, so that's the title Salt and Fire