Here's a tiny bit of horror from Jack Kirby. Well, horror and madness. Madness!
Originally introduced in Jimmy Olsen #142, the miniature world of Transilvane was created as an experiment in learning how to terraform other planets, but for reasons known only to Kirby, the scientist in charge of the project decided instead to seed Transilvane with tiny artificial people and use orbital projectors to constantly play horror movies in the sky.
So naturally, this led to the Transilvanian lifeforms evolving into Draculas, Frankensteins and Wolfmen who eventually started blasting off to the larger earth around them in coffin-shaped spaceships, which in turn caused the scientist to try to wipe everything out with a handy dose of Genocide Spray. [emphases in original]
Alas, the Gothic world gives way to a non-Gothic world, just like in the second Matrix movie.
Fortunately, Superman and Jimmy Olsen stopped all this, and switched out the horror movies for westerns, and now THERE IS AN ENTIRE MINIATURE PLANET OF TINY COWBOY DRACULAS THAT IS STRAIGHT UP A THING THAT EXISTS IN SUPERMAN’S HOMETOWN, AND NO ONE EVER TALKS ABOUT THIS. [emphases in original]
Fan fiction writers, go!
(thanks to Steven Burnett!)