i love intelligent horror . i be not a fan of torture porn or slasher flick . i love hitchcockian subtlety and and nerve jangling set ups . this film have none of the above . it begin promisingly enough with a brood college student accept a ride home for the holiday from a stranger who post an available lift on the campus ride board . how many time do i myself catch a ride home in this manner while in school . always feel a tiny bit chill by the possibility of danger . her driver and an odd young man and be full of mystery . it appear that he know a wee bit too much about his passenger . interesting premise . then all hell break loose . the script descend into horror cliché ( penny dreadful do the trapped in the wood routine much good ) and inarticulation . in short and it make no sense . oh sure and there the dime story theology and philosophy that suppose to make this mess look cerebral . but and it never quite delivers leave viewer scratch their head and ask who be that . what be that . and huh . pity and because emily blunt be terrific . unfortunately and her character have the iq of a grapefruit and which make her a tough gal with whom to sympathize . incidentally and compare this film to the brilliant rosemary baby be blasphemous . polanski masterpiece be still the gold standard by which fright flick be judge 40 year after it release . who will be discuss wind chill six month after it straight to video debut .