For 'The Terminator,' I was asked to drop a bit of weight to get less physically imposing because it wasn't about an athletic build; the build they were looking for was something more unassuming or boyish. And it was tough!

I don't want to name drop, but Russell Crowe is the most famous person in my phone.

I did this film with Russell Crowe called 'The Water Diviner,' which took place just after WWI. It was fascinating because the weapons between WWI and WII were very different. I had to learn how to ride horses in a battle setting. It was important that we rode a certain way.

With 'Divergent' and 'Insurgent,' there isn't great emphasis on uniformity; it's a vigilante military, the state is in disarray, and there is no reference point for authenticity, so it's just weapons work and circumstantial fighting.

When you're working with people you've seen in hundreds of films... it's a bit crazy to step outside yourself for a minute and think, 'This is surreal.' But I try not to get too bogged down in that.