This exceedingly corporeal, existential comedy stars Paul Dano (There Will Be Blood) as a suicidal loser stuck on a deserted island. Hope arrives in the form of a dead body (Harry Potter himself, Daniel Radcliffe), which washes up on the shore. Our protagonist befriends the flatulent corpse, which proves incredibly useful as a jet ski, a firestarter, a grappling hook and other impossible, gas-powered tools. What starts out as a ridiculously gross joke continues to be one—but with an added layer of Spike Jonze-style surrealism. Think Cast Away crossed with Weekend At Bernie's with a dose of Being John Malkovich ... then give up, because you still can't imagine where this oddly touching tale of love, friendship, mortality and farts is going.95 minutes R.