Effects work ‘frighteningly well’ but ‘premise is so devoutly ridiculous,’ critics say. By Kara Warner Sam Worthington in “Man on a Ledge” Photo: Summit If your impressions about the new action thriller “Man on a Ledge” are based on the film’s very-literal title , you’re very likely correct in assuming to know a decent amount about the film before entering the theater. “Ledge” is the story of ex-cop and fugitive Nick Cassidy (Sam Worthington), whose seemingly obvious suicidal plan to jump off a building is slowly revealed to be something much more. Thus far, the critical reception for the film is very different from initial audience reactions. The Rotten Tomatoes Tomatometer has “Ledge” at a 22 percent fresh rating from critics, versus a 65 percent fresh audience rating. Read on to see what has the two viewing bodies so divided as we sift through the “Man on a Ledge” reviews: The Premise “It’s an arresting image, Sam Worthington out on that 40th-story ledge. He’s a fairly tough-looking guy, after all, and we know him best as the tooth-gritting blockbuster hero of ‘Avatar’ and ‘Clash of the Titans,’ so it’s head-spinning to see the man’s beefy figure as a speck hovering so precariously close to New York’s infinite sky. The camera swirls around Worthington’s disgraced former cop Nick Cassidy, inching out past that thin strip of architecture, then back in. What if he trips, or jumps? For a while, anything seems possible, and it’s both exhilarating and terrifying. Then the wool comes off, and it’s clear that director Asger Leth and screenwriter Pablo Fenjves have ambitions considerably less grand than their protagonist’s perch. Cassidy’s ledge game — with all the studio-unfriendly moral ambiguities it entails — is just a con, a photo op for the crowds, and Nick’s apparent desire to exit the material world is a front. What he truly, passionately wants to do is steal some jewelry.” — Andrew Lapin, NPR The Impact of Practical Effect “I, on the other hand, was gripping anything in reach, palms dripping, thinking I might not have survived the effects had they been 3-D. Though there were other production sites, serious time was spent actually shooting on that 14-inch ledge wrapping the 21st floor of the Roosevelt Hotel to create the vicarious sensation of being there. Which worked frighteningly well, at least for the vertiginous among us. Oh, that the actual human dynamics of the unfolding story could have been as dramatic, as on the edge as that ledge.” — Betsy Sharkey, Los Angeles Times The Direction “Mr. Leth, the son of renowned Danish documentarian Jorgen Leth, has directed only one other film, ‘Ghosts of Cit