David Twohy doesn’t reinvent the wheel with A Perfect Getaway, the key to both the film’s minor successes and shortcomings. Interested in straightforward B-movie suspense laced with a dash of wink-wink self-awareness, Twohy’s film concerns a vacationing couple in Kauai – screenwriter Cliff (Steve Zahn) and new bride Cydney (Milla Jovovich) – who, while backpacking in the mountains, hear that a pair of newlywed murderers are loose on the island. Wouldn’t you know it, they then immediately find themselves faced with two sets of suspects: a menacing pair (Chris Hemsworth and Marley Shelton) angry over being denied a hitchhiking ride, and a super hunting/camping twosome (Timothy Olyphant and Kiele Sanchez) who seem a bit too handy with a knife. Twohy lets his story’s central guessing game play out with patient tautness, and his cast’s performances – whether directly addressing the issue of “red herrings” and “second-act plot twists,” as Olyphant does, or merely exuding a playful “how dangerous am I?” ambiguity – keep the mystery lively. It’s too bad that Twohy telegraphs his climactic surprise from the opening-credits prologue, yet his otherwise capable misdirections are sturdy enough to cast minor doubt on the final outcome, just as his generally clean, gimmick-free direction keeps the action lean and swift. A third-act filled with too much flash and sizzle, as well as dull flashback exposition, mucks up the preceding tense atmosphere, but as far as modest genre exercises go, A Perfect Getaway nonetheless gets enough right.