Now, I have to - in my defense, I have the say that general knowledge of the deadly nature of cigarettes was not primarily in my mind and nor was it on these poor cowboys, who - many of whom who've died of emphysema since we were shooting.

I had a rope around my waist, and the rope was attached into the helicopter in case I fell off. And the shot was a shot that began with Kim Novak going out of a house and getting into a bus. Then it was supposed to go over the countryside and find a freight train on which Bill Holden was standing. And then after seeing a good look at the freight train, the camera was supposed to move up into the sky for the end credits.

There was no actually stock footage in "Medium Cool." I wrote the script. I wrote the riots. And I integrated the actors in the film in the park during the demonstrations. But nowhere was it like we had stock footage and then later, in editing, integrated it into the film. It was all done at the time.

I think that the whole voyeuristic attitude of filmmakers or of me personally - of shooting documentaries and so forth - is an important issue. And it was an important issue to me, personally. And the whole question of when - when do you put the camera down or when do you keep shooting to get the shot. And a number of times in my life I've had that question hit me very hard.

Not one Wall Street executive has been charged with crimes since the 2008 financial crash.

When I started, we had just the camera and the person, mostly. And if you wanted to do a dolly shot, particularly working in Chicago where I began, you'd get in the back trunk of a car, and you'd have a friend drive the car, or you'd get in some kid's little wagon that he plays with and have someone pull that for dolly shots.

My mother let me know that we're all connected. If some of us become more affluent it's not because we're better or even smarter people - we have a responsibility to ourselves to be a good boy.