Wendy: Ghosts? Sweet.
The Middleman: Dubbie, there's nothing sweet about ghosts. Spirits only linger in this world when they have unfinished business, violent vengeful business.
Wendy: But Casper's such a friendly guy.
The Middleman: It may all seem like light and magic at first, but the next thing you know the walls are bleeding and you've got 25 pregnant women running around screaming "Mary, Mary, Mary!" and clawing their eyes out with knitting needles while your own hair grows to three times its length and tries to strangle you.
Wendy: That sounds… specific.