I’ve written voluminously about the peculiar magnetism of Napoleon Dynamite. Suffice to say that if for some reason you haven’t yet seen the film, then jumping with two feet into the middle of its rapturous cult reception can be a bit overwhelming. Jon Heder plays the squinty-eyed title character, and even if every future role he ever does demystifies or devalues slightly the wonked-out uniqueness of his grade-A nerd petulance on display here, it still won’t diminish the idiosyncratic charm of the movie as a whole. Napoleon Dynamite, like all lasting comedies, locates its humor in universal conditions and circumstances told from a very specific and canted point of view.