It's the opposite journey from what I've usually done with films. I find it very easy to go from, say, a lit, pleasurable environment, like what you see outside there, to a very dark place. But the opposite journey, which is what this movie takes, is much more complicated.
“And then the really awful thing is that at the end of the day after crying and experiencing things, then you look at what you've written and you're like, 'Hmm, there's half a page that's good here.' Then you throw out everything else.”