It happens sometimes that the material itself carries things you have not fully planned. The footage has its own right, its own life, its own vibrancy and energy in it.

Facts sometimes have a strange and bizarre power that makes their inherent truth seem unbelievable.

The wonderful thing is that Clive [Oppenheimer ] insisted on training his camera - his private camera - on me at one point. We were discussing things such as how to avoid certain dangers, while reflecting on a volcano that had threatened to explode 40 years ago.

Of course, you do not do any research: you have to go there and do your film. It's not that I would travel there before without a camera and spend half a year on one of those volcanoes and then come back with a camera. You have to have some sort of a clear mindset.

This climate surrounding me has reached Clive Oppenheimer. In practical terms he sees that I'm not interested in any sort of daredevil stunts, I'm just interested in the work. And he's convinced that I'm clinically sane.

Never wallow in your troubles; despair must be kept private and brief.

I do not want to have a cell phone. I do not want it for cultural reasons. I do not want to be available all the time. I want to have time to think and to touch somebody, and have a meal across my kitchen table without a cell phone, being constantly on tweets.