Brad Pitt turned a real-life hero on the set of his new movie 'World War Z' on Wednesday (24th August 2011). The Hollywood movie star was filming a chaotic zombie invasion scene when he noticed a woman had slipped and fallen in the sequence shot in Glasgow's George Square, reports the Scottish Sun.

Pitt and director Marc Forster are reportedly growing "slightly concerned" about the number of injuries that have already occurred over the course of filming the hugely anticipated movie. The extra slipped and fell during the 700-person invasion scene, but Pitt luckily came to the rescue - an insider said, "Lots of people hurt themselves, and Brad came to the rescue of a woman who slipped.I don't think she could believe it when Brad picked her up. He didn't have time to speak to her as it was mid-shoot. But she said afterwards how grateful she was, despite having a badly grazed knee". According to an eyewitness, "loads of extras suffered bumps and scrapes", during Wednesday's intense battle scene and everyone was urged to be as "careful as possible".

Brad Pitt plays United Nations employee Gerry Lane in the apocalyptic action movie set for release in 2012. His character travels the world in the hope of stopping the zombie pandemic.