Lucio Fulci is best known for his manic fever-dreamish horror movies that offer a little slice of Hell on Earth. His movies are basically plotless, with scenes hung up on the flimsiest framework of story, so as to allow the most amount of carnage possible without letting things like character development, exposition or coherence stand in the way of what he wants to really get down to.
The most surprising thing about this method of filmmaking is that it works. Films like The Beyond are somehow incredibly personal. You get a sense of what he fears. You get a sense of his insecurities. He’s apparently terrified of eye-gougings, so he films them whenever he has an opportunity and lingers on the remains almost fetishistically.