Gone Girl: 10 Things That Are Different in the Movie

During one chilling scene in the book, just after Amy returns home, Nick coils his hands around Amy and starts to strangle her to death. He quickly realizes, as the life drains out of her, that killing Amy would turn him into the killer he spent so long insisting he wasn't. He just got off the hook as a murder suspect, and if he went through with it, he'd be right back where he started.