You are in a place that has not been seen for tens of thousands of years, because it was so sealed off. There is such silence that when you hold your breath you can hear your own heartbeat. Everything is so fresh that you have the sensation that the painters have merely retreated deeper into the dark and that they are looking at you.

One of the most original and poetic works of cinema made anywhere in the seventies.

There is a fascination about crime, which is understandable, but hardly anyone talks about the families of victims of violent crime and the devastation that is beyond the victim alone.

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.

There are photos of Kim Jong-un right up atop the volcano. I actually wrote a letter to him asking if I could speak on camera. I never got an answer. But what was interesting was the people who were responsible for us, our "guards," it took them two days to figure out how I should address him. "President? No, you can't because there's a president for eternity." And it was a time when his status was still in flux. Only a few months later there was this party congress which assigned an official title to him, but that was after we did our film.

I must say, the people who started this whole Masterclass series have been very helpful and very intelligent to point out certain things and also give me some guidance, "isn't there something missing, shouldn't we address this or that?" so it's not completely alone out of the blue. It's very well thought through.

I think I would be a good villain in a James Bond movie. They were fairly weak, the last half-dozen of villains in James Bond movies were not that convincing.