I'm not sure if I really believe in ghosts or in supernatural phenomena, but
if there were such things I'd like to point out some sort of belief or things
that I've heard. If I have understood right, ghosts are spirits of the dead
person and so on so it seems somewhat not correct that the corpses, which do
not have soul left as it is drained to someone's possession are able to
reanimate themselves. Briefly put, corpses without souls shouldn't get
reanimated.