To act with a tennis ball and imagine it's a tentacle, or if you're in some kind of wilderness film and you go, 'Okay, we can't have a grizzly bear here, but imagine when you step over the rock there there's a grizzly bear.' I don't know. They're tough moments.

Whenever you deal with science fiction you are setting up a world of rules. I think you work hard to establish the rules. And you also have to work even harder to maintain those rules, and within that find excitement and unpredictability and all that stuff.

It's tricky. I've never been standing at the top of the tree with tons of money thrown at me. I've never really had a profile. So in a way I have this 'nothing to lose' attitude.

That's one of the great privileges, being an actor, is that someone pays you and sends you off to learn about something that otherwise you'd never know about.

The tricky thing becomes: Do you know yourself well enough to then portray that on screen? And for me, I find that really hard. I'd rather hide behind accents and funny walks.

The sum total of all my stop-starts have made me less concerned about the future. I'm just aware now that I'll always land on my feet somehow.

North America makes a ton of movies and there's a ton of movies that are exceptional.