Watch the Terrifyingly Great Trailer for Christmas Horror Movie Krampus

He knows if you've been bad or good, so be good for goodness sake.

Christmas horror movies aren't a widespread genre, with holidaying folks ditching titles like 2010's Rare Exports (in which a homicidal Santa Claus was unearthed in an archaeological dig) and 1974's Black Christmas (college dorm slasher, set at Christmas) and preferring to pick up Home Alone for the hundredth time or anything starring Tim Allen. But this year, Christmas movies take a turn for the hilariously terrifying.

Krampus is your unlikely new Christmas nightmare, directed by Michael Dougherty (who gained a cult following for his 2007 holiday horror film Trick 'r Treat). Set for release December 3, the film stars Adam Scott, Toni Collette and David Koechner as your regular family holed up, snowed in and arguing over shitty turkey at Christmas time. But when they lose their Christmas spirit, a scary-as-shit Christmas spirit, Krampus, decides to pay the family a visit — the ancient hoofed, horned antithesis to jolly ol' Saint Nick.

Go on, give it a watch. You'd better watch out, you'd better not cry.