Like "Carrie" before it, "Ginger Snaps" uses horror-movie conventions as an inspired metaphor for puberty. When beautiful but reclusive goth teenager Ginger (Katharine Isabelle) is attacked by a monstrous wolf on the eve of her first period, her body starts changing in a big way, as do her suddenly lusty, feral appetites. Director John Fawcett masterfully balances the expectations of teen horror exploitation (blood, bodies, sex, smart dialogue, and good old-fashioned monster-movie scares) with clever black humor and tender sisterly solidarity. Only devoted sister Brigitte (gloomy Emily Perkins) knows the truth, and even as Ginger's abrupt transformation threatens their once unbreakable friendship, bonds of blood and love keep them together: Brigitte disposes of Ginger's victims while searching for a cure. Mimi Rogers costars as their dotty but unexpectedly sensitive mom, ready to sacrifice all to protect her daughter. Blood and blood ties have never been more evocative. "--Sean Axmaker"