TED-Ed lessons are for kids, teenagers and, well, anyone with a passion for learning. And yet, sometimes these animated lessons get downright scary. Here, a collection of terrifying creatures from TED-Ed lessons—in gif form, naturally—to help you get in the Halloween spirit.

From the lesson: Beware of nominalizations (AKA zombie nouns)

From the lesson: Diagnosing a zombie: Brain and behavior

From the lesson: The brilliance of bioluminescence

From the lesson: The terrors of sleep paralysis

From the lesson: How do you decide where to go in a zombie apocalypse?

From the lesson: The science of stage fright (and how to overcome it)

From the lesson: Vampires: Folklore, fantasy and fact