A video from the set of director Marc Forster's (Quantum of Solace) adaptation of Max Brooks' World War Z has popped up online and it gives viewers a great look at what transforming into a zombie is all about (Hint: you become very flexible). Starring Brad Pitt, Bryan Cranston, Anthony Mackie, Matthew Fox, Mireille Enos and James Badge Dale, the film centers on a United Nations employee (Pitt) who trots around the globe in an attempt to stop a devastating pandemic.Check out the set video after the jump. World War Z is set to open on December 21st, 2012.Set video courtesy of HMS Friday [via Film Drunk]:Here's the official synopsis for World War Z:

The story revolves around United Nations employee Gerry Lane (Pitt), who traverses the world in a race against time to stop the Zombie pandemic that is toppling armies and governments and threatening to decimate humanity itself.  Enos plays Gerry’s wife Karen Lane; Kertesz is his comrade in arms, Segen.

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