Dark variation of Chekhovs Gun. A seemingly minor detail turns out to be something horrible.
"Not hear it? -yes, I hear it, and have heard it. Long -long -long -many minutes, many hours, many days, have I heard it -yet I dared not -oh, pity me, miserable wretch that I am! -I dared not -I dared not speak! We have put her living in the tomb!”
-Roderick Usher, The Fall of the House of UsherWhen a Chekhov's Gun is pulled on something minor or easily overlooked to evoke a sense of fear, horror, or disgust. Often, but not always, a Horror Trope. This is an example of when More than Meets the Eye takes a dark turn— the Devil in the Details— where a seemingly minor or innocent detail gets over looked, and turns out to be far more significant and sinister than anyone would have imagined. Usually by the time it’s recognized for what it is, the damage has already been done. It’s almost always paired with a Reveal or Plot Twist, and usually comes with a heavy helping of Fridge Horror. There are two varieties of this trope: Type I: Where the audience is given enough clues that they are aware of the danger, but the characters are not, typically because the audience is Genre Savvy and the characters aren't. The reveal is more of a suprise in-story. Type II: Neither the audience or the characters pick up on the hidden danger. Pulled off effectively, it comes as a complete shock that utterly horrifies both the characters and the audience, while also making perfect sense within the context of the story. If done ineffectively, it can come off as predictable, confusing, over the top, anticlimactic, or even Narm. Not to be confused with Devil in Plain Sight or Devil in Disguise (although if the detail in question really is the devil, it can overlap with the latter). Also not to be confused with the Awful Truth, where unplesant information is intentionally being kept from the characters rather than simply being overlooked or misidentified. The reverse of this trope would be The Dog Was the Mastermind, where the cause of something horrifying actually is something minor and silly. May overlap with Not-So-Imaginary Friend, Earth All Along and Bitch in Sheep's Clothing. Also not to be confused with subliminal imagery or scary background elements. Current unlisted Examples: