Where did the “unfinished business” concept for ghosts ever start anyway? Ya know, that the reason someone is a ghost on earth and not in some afterlife somewhere is that their “business” is “unfinished”.
What about people whose unfinished business is something terrible? Does that still count? Or what if it’s like… hang-gliding? Are there any ghost rules that are really hold up? This is why I don’t believe in ghosts. Plot holes.