When changing our sheets not long ago, my wife came across a centipede, which scared the crap out of her. First of all, these things aren't something one typically finds scurrying about on a mattress. Second, and more relevantly, centipedes are freaky little critters propelled by hundreds of legs, which makes them seem just a little more alien than your typical home invader.
Since then, my wife has checked the bed every night for centipedes. I have no idea if these hellish little arthropods actually move in swarms or colonies, but the concept is certainly enough nightmare fuel for a decent horror movie. The Thai film, Creepy Crawly, tries to exploit their inherent ickyness, but is only partially successful.
The story has a small group of people quarantined in a hotel during the COVID pandemic. How or why they came to be stuck there is never sufficiently explained, but we can roll with it for the sake of the scenario. However, in the building with them is a bloodthirsty, multi-armed beast that moves from one victim to another by possessing them.
|This is why I never check under bed when spring cleaning.