Stu (Brendan Fraser), creator of a twisted cartoon about an uninhibited monkey, is poised on the brink of happiness. After leaving a party to celebrate signing with the Comedy Channel, he is on his way to propose to his girlfriend, Julie (Bridget Fonda), when tragedy -- or rather tragicomedy -- strikes, in the form of a slapstick car accident that sends him into a coma. While Julie waits faithfully by his hospital bed for months, Stu descends into a nightmarish limbo called Downtown, inhabited by his freakish cartoon creations, including the nutty monkey of the title. Here director Henry Selick returns to what he does best, conjuring a whimsical, frightening fantasy world like those of his previous films, A Nightmare Before Christmas and James and the Giant Peach. Though populated by familiar man-beetles and cat-women, Monkeybone leaves the whimsy of those two previous films behind for a more mature tone. It never quite arrives, however, basking instead in an adolescent gross-out humor -- a tactic that makes an interesting point about the sophistication today's blossoming adults in general and Stu's id in particular. Monkeybone, the character -- digitally animated and voiced by John Turturro -- is a libidinous trickster with a penchant for fart jokes. Adapted from the graphic novel Dark Town, Monkeybone has more the look and spirit of a comic book, from its broad performances to its cornpone ending. The outrageous humor at play here is aimed squarely at those who haven't lost touch with the primate within.