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.

You have to keep surprising your audience.

I think the most important thing is to, without belligerence, stand up for what want. Argue compellingly if someone tries to change your script. Yeah, legally they can if they want to. But rather than give up, as some of the writers do, and just wail about how your script got rewritten, it's much more difficult - but well within the realm of possibility - to argue very sincerely, calmly, and reasonably from your point of view, such that the director or the producer might decide, "All right, let's do it that way."

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 think it's very admirable, in a superhero movie, to be able to take a few risks.

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.

An action movie should, like any other, follow the narrative traditions of literature. That means there should be subtlety, a slow build and a gradual bringing together of all the separate threads of the plot. To see all of it coming together slowly is very rewarding for the audience.