It sometimes is better to write in a more directed, focused way when the pages are aimed at something already, a mission statement or a basic spine that represents the theme or the concept that you've agreed on, and writing partners are great for that because you can sit there until you get it.

I think it's an obligation to make a movie full, so you have to see it twice to get all the moments.

I wrote all the time, but the idea of doing it professionally seemed like pie in the sky. Who gets paid to write? I grew up in Pittsburgh, so it wasn't really a notion that a lot of people pursue.

I have a shoebox: for ideas, fragments, snatches of conversation I hear. I scrawl it down, throw the scraps in the box. Every time I start a new script I start picking through the pieces. Suddenly you get five pieces together and think: this is almost the first Act of a movie, if I flesh it out a bit.

I wanted at one point to act, which is a weird thing for men to want to do. It's a very vain profession. I don't mind women who want to act. That's fine. It's odd that men want to act, in that there's still a degree of vanity associated with it. It's like, "Put on some makeup, make me look good. Okay, now I'm going to roll my shoulder." Part of me still feels like, "Wow, that's weird for a man to do."

When you only have $15 million, you have to talk about something interesting. You can't just cut to a helicopter exploding.

I always have humour in my action movies. I think characters that make jokes under fire are more real. It somehow helps put you in their shoes.