Tusk

In Kevin Smith’s horror comedy, a deranged ex-sailor in Canada (Kill Bill‘s Michael Parks) decides to turn a visiting podcaster (Justin Long) into a walrus. Think that sounds crazy? Wait until an uncredited A-lister (we won’t say who) turns up two-thirds of the way through to hand in his most berserk performance to date (and that’s saying something). Tusk lands close to Human Centipede territory in gross-out-ness — a warning, not a complaint — but it also has a genuinely haunting quality as Long’s ties to humanity become ever more tenuous. B+

• By Clark Collis