The animated "Goonies with zombies" horror flick ParaNorman is stuffed with floating green spirits and an adorable ghost puppy dogs (who've been horrifically sliced in two). In this exclusive featurette, the voice cast of Leslie Mann, Anna Kendrick and Jeff Garlin explain how real experiences with the paranormal and certain real-life ghosts that influenced ParaNorman. Plus, check out lots of new spirit-centric footage tucked away in this featurette.

Also here's an adorable behind-the-scenes look at the insane attention to detail required for making one puppet for this movie.

And another behind-the-scenes look! ParaNorman hits theaters on August 17, 2012.