THe rules are simple, You First make a wish, But then the person Under you corrupts it While also making a wish them-selves. Example: Person 1: I WIsh for a tiger. Person 2: The Tiger Mauls you to death. I Wish for a Non- Corrupted wish.
Granted but the zombies weren't the slow and stupid kind... They were the invincible ninja zombie kind! And also the barricade is just a pile of dead family members...