"Zebrahead" is not so much a movie as notes toward a movie - a good one, judging by what's on the screen. The strength of the central story is undermined by loose ends and subplots that are hinted at but never developed, and watching the film is a little like solving a puzzle. If the director didn't have the money to finish what he started - and apparently he didn't - then he should have been more merciless in his editing, leaving out the footage that's distracting.