Director Zach Snyder (300, Watchmen) indulges his most visual fetishes in this trippy but vapid action movie mindbender. Emily Browning (Lemony Snicket's A Series of Unfortunate Events) is a sexy young thing who gets plopped into an ominous mental institution after running afoul of her evil stepfather. There, she joins forces with fellow miniskirted inmates Abbie Cornish, Jena Malone, Vanessa Hudgens and Jamie Chung and learns to escape into a fantasy world of her own creation. Naturally, that world is filled with fire-breathing dragons, Nazi zombies and gigantic robot samurai with Gatling guns--as is the imagination of all young ladies. 109 minutes PG-13.