The worst of the action films are the ones where everything is one shout from beginning to finish. And there's no differentiation between beats, like small or big, or quiet or expansive. It's all just one loud shout.

The other thing being at UCLA was just being in California and around the movie business. Which I honestly believe, and I've told this to screenwriters, you have to do. You have to be there in order to write or direct movies.

You have to keep surprising your audience.

An action film can have too much action; picture an equaliser on a stereo, with all the knobs pegged at 10. It becomes a cacophony and is, ultimately, quite boring.

I thought of Joel Silver. He never changes. He's sort of the unmoving, unchanging rock of Gibraltar in the otherwise-shifting world of Hollywood. He's the same as he always was. He looks the same, talks the same, has the same enthusiasm.

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.

Directing comes closer than anything I’ve found yet to providing me with a good reason to get up in the morning that goes beyond just getting some money. Because all the money does is buy the bed. Getting out of it is the problem.