Are there any stories on /r/NoSleep that the main character (or the character speaking/telling story) was, in the end, identified as the monster?

I'm more interested in stories where the monster was afraid of the human, but a monster afraid of another monster or the main character just being the monster is great, too! Thanks for any answers!

 Also, I do not want any stories about the main character being a human 
and simply being the murderer (if the story is about a murderer). 
I really don't like those types of stories.