The biggest lesson we took was when Werner [Herzog] said in a meeting with us that the mother of all challenges is to get your film seen in theater. To finally share this film has been so gratifying. The way audiences have responded, too.

It was Herzog, the man himself. He was so welcoming and kind and not at all the persona you'd seen in a magazine, or in "Burden of Dreams" for that matter. I'd shot the behind-the-scenes for "Bad Lieutenant." It was a very normal production. Nothing like "Burden of Dreams."

At one point, we were stuck at the border of Peru and Colombia and met this large Haitian population that was stranded there without passports and couldn't move. We had this revelation that, as tourists, we were so free to move, and here was this other population who couldn't cross borders.

The lessons learned on a pure practical production standpoint were immense. It instilled a faith that you can accomplish what you want if you just believe and stick together and continue to work at it. In that sense, it gives me the confidence to go into the next project with the belief that we can do it. This was an experiment in whether you can find a film without a singular conceit.

So to watch that production was just the most insane vision of a filmmaker being unrelenting in his will to create. Learning more about that was what we wanted to do. To find out how in God's name anyone could do that.

What we definitely agree with Walter on is that filmmaking is teamwork. It's one of the only arts that is truly based in the work of a team. Anyway, Werner he told us a lot of practical things. How to hang a hammock. He'd circle a map and give us a notebook with directions to get to certain places that were out of the way. He told us to drink the river water and not use purifications tactics that only "New Age assholes" used. He said that if we saw piranhas, we should jump in and swim with them. We did all of this. We took his word as gospel.

There were the classic challenges any tourist faces, like getting lost, getting sick, losing things, getting in a fight... All these things happened numerous times. The only point of the trip that was defiantly challenging was a point that's not actually in our film.