In either case, witch opponents get preoccupied with the disembodied heads, which fly around howling and trying to bite. Since human men have more yang energy than human women, they are a prime target for the seductive powers of female ghost. Whether the ghost's motives are noble or duplicitous, this kind of love never ever works out. Even if you started out as the hero of the film, if the geomancer says trouble ahead, you better stock up on incense and Hell Bank Notes, because you are done for. When the exorcist asks for sticky rice, he damn well means sticky rice.
Sticky rice is the active ingredient in poltergeist poultices.
The consequences can be dire. On the other hands, the number eight is considered quite lucky, and you'll spot it everywhere, from billboards to personalized license plates. If your pet fish die, expect trouble. If you hold your breath, you are invisible to a vampire. This is why Chinese Temple often have a threshold you must step over, or why pawnshops have a screen directly in front of the entrance.