Anyone who is familiar with Gillian Flynn's thriller Gone Girl will know that it's not all sunshine and roses.
The bestselling novel (the one literally everyone was reading last summer) spins a dark tale, following Nick Dunne, a man who finds himself under suspicion when his wife goes missing on their fifth wedding anniversary.
But it seems the film, from director David Fincher, is even darker than the book...
Trent Reznor, who composed the score for The Social Network and The Girl with the Dragon Tattoo, is currently working his musical magic on Gone Girl, which stars Ben Affleck and Rosamund Pike. He's already watched the movie multiple times (a lucky man, eh?) and his verdict?
Well. That it's "nasty".
Speaking to Entertainment Weekly, the composer said: "It's a much darker film than I was expecting."
"The book is not exactly uplifting or happy," he continued, "but it's a nasty film."
Watch the first trailer for Gone Girl:
Gone Girl will be in UK cinemas 3 October.