The simplest trick in horror is to make something natural act in a way that isn't. Ghosts can usually fly, walk through walls, disappear, and so on. But one need not invoke the whole suite of supernatural effects to achieve unsettling ends. Sometimes, a more subtle approach can achieve truly disquieting effects.
Ghostly Glide is when a character gets around by less than ambulatory means. The [...] [tvtropes.org]