Don't get seduced by your own stuff. Don't get high on your own supply. The hardest thing as a filmmaker is when you're watching a film that you've worked on for several years. You know every frame so intimately that holding lots of the objectivity of a new viewer who has just seen it for the first time is the hardest thing. Every aesthetic decision you make - and you make thousands of them every day, have to - in theory, must be done from you being a blank slate. You almost have to run a program, like a mind wipe, every time you watch the movie.

I'm a curious guy. I can't turn away from an investigative story, when it comes to the forensic analysis. I've done 33 dives, to the titanic wreck site. I've spent over 50 hours piloting robotic vehicles at that wreck trying to piece together what happened during the disaster. How the ship broke up, comparing the historical record with the forensic record. Documentaries are kind of my new life. I love documentary filmmaking.

I do an awful lot of scuba diving. I love to be on the ocean, under the ocean. I live next to the ocean.

I don't just want to be associated with a few good 3D movies and the audience is saying all of the other ones are crap.

Your imagination can create a reality

It's important for me to have hope because that's my job as a parent, to have hope, for my kids, that we're not going to leave them in a world that's in shambles, that's a chaotic place, that's a dangerous place.

If you wait until the right time to have a child you'll die childless, and I think film making is very much the same thing. You just have to take the plunge and just start shooting something even if it's bad.