Director Marc Forster and star Brad Pitt continue their heroic endeavors in Glasgow this week, as they're filming zombie rampages for World War Z. In this leaked clip, courtesy of PikoDesign360vr, we can now confirm that the undead will move quickly as opposed to the slower ones from the novel. As mobs of humans flee from an attack of living brain-munchers, one unlucky guy gets dragged down to the ground, bitten, and then turned into a member of the walking stiffs. 

Sucky way to go if you ask us, but the Max Brooks adaptation is shaping up to be one that is worth the wait. For those who haven't been following the story, World War Z follows Gerry Lane (Pitt), a United Nations employee who documents the zombie pandemic. Mireille Enos is on-board to portray his wife, James Badge Dale plays Captain Speke, who tries to alert the military brass on the impending zombie attack, and Bryan Cranston recently joined the cast in a pivotal unrevealed role.

The YouTube clip has created a healthy discussion about how good/bad World War Z is. Let us know your thoughts about it in our comments section. The film is scheduled to be released on December 21, 2012.

[via /Film/YouTube]