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.

There is a very particular feeling I get when I have the camera in my hand, looking at an actor talk, knowing that what I’m shooting will end up on the screen.

When I was in Vietnam with Jane Fonda, I was shooting a farmer in a field - just a pastoral scene. And while I was shooting him, an explosion occurred right - he blew up right in my lens, so to speak. And he had stepped on a landmine.

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.

The helicopter was a U.S. Navy helicopter. There were no civilian helicopters available to film companies, so they just made some stuff out of two-by-four wood. And I would straddle a two-by-four out from the helicopter with a camera and what we call a high hat, which is a low metal stand.

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.

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.