So I'm writing a short story now, a sort of horror suspense thing, and I wanted to end it with a twist, something to make the reader think. I'll give you a brief overview of the plot: MC wakes up in dilapidated house, doesn't know how he got there. He hears his wife calling for him, and assumes he's been drugged or something, and someone has taken him and his wife hostage. He explores the house, occasionally glimpsing her, as well as the shadowy figures of her captors. Through flashbacks, it is explained that MC and his wife had lost a son in a car accident, and you eventually see their marriage fall apart. As MC continues to try to find his wife, minor supernatural events occur to MC, causing him to doubt his sanity. Shadowy figures try to stop him from reaching his wife, and when he finally gets to her, MC sees her standing over his own dead body, apparently after committing suicide. He had been dead all along, and the shadowy figures take him into the darkness. Now, there's a bit more to it than that, but that's the gist. I really like the story, but it's a little M. Night Shyamalan, and I worry about it being kind of cliche. After some interesting research on Wikipedia about the folklore of Shadow People, I learned that there are parts of the brain that can be stimulated to generate shadowy images in a person's peripheral vision, often mistaken for humanoid shapes due to the phenomenon of "pareidolia", or the tendency to see human features in random shapes, which I always thought was interesting. Also, I read about insane asylum patients who are given sedatives that induce a state of vivid, paranoid hallucinations. So I guess my question is, do I go the supernatural route and have him just be dead and in a Purgatory of sorts, or do I go one step further and say it's all in his head, and is an allegory for his deteriorating psyche?