When you hear the word tear gas you think, well, your eyes will burn and that's it. But that whole feeling of your whole skin burning, that you can't breathe, you can't inhale, you feel suffocated - it's a very, very terrifying experience.

I rationalize out, well, how much help could you really be, you know? And maybe if people saw this, they'd realize the brutality of war and figure out there's got to be some better way than killing human beings who are just trying to farm a field.

From my image of digging around in the mud like a grunt, I preferred fighting the war from ships.

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.

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.

We, as film-makers, are privileged. We can make people cry or laugh. We can make them think and feel. It is a great privilege and a great responsibility.

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.