Trent Reznor, the renowned musician who is collaborating with director David Fincher for the third time with this fall's Gone Girl, is one of the few people in the world right now that has seen the full movie, and his words on the film are interesting, to say the least.

In an interview with Entertainment Weekly, when asked about his work on the film, he commented that it was a "nasty film" and that "it's a much darker film than I was expecting."

“The book is not exactly uplifting or happy, but it’s a nasty film," were his exact words.

While Reznor has certainly been experienced to working in nasty projects, to say the least, he also went on to say, "it hasn't been completely foreign to work on."

Reznor is, at the moment, splitting his duties between the movie and touring in Europe promoting his band Nine Inch Nails' newest album Hesitation Mark. In addition to this, he is also going to be spending the summer going around North America touring with the band Soundgarden. As such, he is working on the film between the gaps of time that he has at the moment.

“I’ve been working on it pretty much all this year on and off during the gaps, and we’ve got a good portion of the composition in good shape,” he noted to the publication while on break at a tour stop in Finland. “I’ve seen the film a number of times, and we’re deep into the integration part of it. I would hope by the time we leave for Soundgarden that it’s smooth sailing. And if it isn’t, there will be a studio set up in every hotel room until it is.”

As this is the third time Reznor and his musical partner Atticus Ross have worked with Fincher, the other two times being The Girl with the Dragon Tattoo and The Social Network, for which they won the Oscar, they note that, while they are certainly more experienced than they ever were before, they are still learning all the same.

“Not really knowing what I’m doing in the world of scoring films, the best decision Atticus and I made starting with The Social Network was really just to listen and really try to understand what David is thinking,” he said.

He went on to note his role in Fincher's process.

“It’s clear he has a pretty realized vision in his head, and he’s thought a lot about whatever project he is working on, and I’ve always felt like our role is in service to that. How do we translate the role that he thinks music should be, and the tones and textures and spaces it’s allowed to take up, and then make it better than that? So step one in all the projects we’ve done with him is just to sit and let him talk about it and listen before any music is written or before any palette of sounds is chosen. That’s been the right strategy so far.”

As such, Reznor says that he has been enjoying his work on the film thus far.

“This film has been really fun to work on," he said. "It’s been an interesting challenge with some different parameters, and it keeps us on our toes. That’s what makes it good."

Gone Girl will be released on October 3.