I used to say that interviewing others was perhaps the way I could stop talking and start listening. It's a kind of enforced silence.

Like all great documentaries, The Act of Killing demands another way of looking at reality. It starts as a dreamscape, an attempt to allow the perpetrators to reenact what they did, and then something truly amazing happens. The dream dissolves into nightmare and then into bitter reality. An amazing and impressive film.

People think in narratives - in beginnings, middles and ends. The danger when you edit something too severely is that it no longer makes sense; worse still, it leaves people with the disquieting impression that something is being hidden.

Ecstatic absurdity: it's the confrontation with meaninglessness.

In fact, part of the Netflix series is drama.Beyond re-enactments. Why not invent something new?

One of the strengths of my interviews is that I really, honest to God, have no idea what people are going to say.

You can't really trust anybody who doesn't talk a lot, because how would you know what they're thinking?