Sam Worthington isn’t a great actor. If it wasn’t already official, it is now. But in a film where characterisation is of minimal consequence, he’s charismatic enough to get through. Man on a Ledge is such a film. In fact, this ludicrous thriller cares very little for any of the players, instead concentrating on the game. There are some genuinely tense scenes – mostly involving Jamie Bell and Genesis Rodriguez attempting to steal a $40m diamond – and the vertigo-inducing premise is intriguing for the initial hour, yet by the final act there’s nothing more than a cheap curiosity holding it together thanks to one plot contrivance too many. Considering the supporting cast included Bell, Ed Harris, Elizabeth Banks, Anthony Mackie and Titus Welliver, it’s a real shame that director Asger Leth couldn’t extract more from them too. A sporadically entertaining misfire.