I loved watching documentaries and had wanted to try making one for years - I'd just put it off as other opportunities arose. But I felt like time was running out for me if I wanted to do it.

I think if the extremists were happy with my films, I'd start to worry.

I took a leave of absence from the internet company where I was working and bought a camera and a copy of Final Cut Pro editing software and made my first feature film, "Street Fight." It followed a crazy, racially charged mayoral election in Newark, NJ in which a young guy named Cory Booker was taking on the political machine of that city. It went on to be nominated for an Oscar and Emmy and was a real example of DIY film-making.

I think this is one of those issues where the deeper you dig, the murkier it gets - and everyone who has spent a lot of time thinking about these issues.

It was our goal to dig into the characters and really try to find out why they think the things they think and why they do the things they do - and we got some amazingly candid and revealing interviews - but it's not my job to offer summary judgment on those interpretations.

I don't think that any law enforcement got in trouble for the event in Eugene where police sprayed the tree-sitters who were protesting the cutting of the trees for the parking garage.

There are some audiences who are uncomfortable with the ambiguity, though. They want a film to chew their food for them, they want Hollywood endings that tie everything together in the end and answer all of the questions. They are usually people on one extreme of the political spectrum or other and they haven't been happy because the film is not polemical enough on their side. They aren't usually people who aren't interested in understanding points of view that they disagree with - they just want to attack their opponents - and I'm ok with them not liking the film.