It has just occurred to me that, in the story that I am writing, the character whose head I am sitting in is going to do a terrible thing. I am not writing it now; I am only sitting in my bed, my fingers stained with the scent of a fashion magazine, and thinking about it. It looms ahead, but doesn't move closer. It's like watching someone walk into a darkened room while they're in a horror movie, except that you can't tell them to stop, not even in the hopeless and futile way you might shriek about the Man With the Knife!, because the monster that is hidden just ahead in the dark is the character themselves.
Alice is in a natural history museum. She is going to do a terrible thing.