I run my own film school, the Rogue Film School, and I do it over three and a half days, eight hours non-stop everyday; alone, single-handedly. But the difference is in the Rogue Film School I do have real human beings in front of me from all over the world, and of course there's this course as well, they can ask, talk about their problems and obstacles, finances, anything, you just name it. Whereas in the Masterclass, you are speaking to cameras.

Otherwise you have to repeat a lot when you're filming. And I've seen the film and it's in a border town in Mexico close to the border with the United States, so of course you have a lot of traffic and noise and dogs barking right nearby, and for that you have to repeat a lot and Robert Rodriguez didn't do that. Smart, smart, smart, you better have smarts also.

The deal was we had to have people accompanying us and they would ask us not to film something [in North Korea]. For example, we wanted to film at a certain place and there happened to be a building under construction and it didn't look as fancy as the other buildings, so they wanted us to shoot where everything looked finished and made a good impression of the cityscape.

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.

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.

Facts do not constitute truth.

Ambition is to be the fastest runner on this planet, to be the first on the South Pole, which is a grotesque perversion of ambition. It's an ego trip, and I'm not on an ego trip. I don't have ambitions - I have a vision.