How do you start a piece? How do you know when a piece is finished?
I look for things or places that terrify or upset me. I zero in on that. I try to come to terms with the subject, get close to it, to the point of absorption. For example, I filmed at a sewage treatment plant, at a morgue where an autopsy was taking place, and at a pig farm.
I keep editing the piece, reviewing the video and making changes, until there is nothing more to change.