The bloody final battle between humans and apes was the climax of this summer's blockbuster Rise of the Planet of the Apes. But how did Fox capture a human-vs.-animal showdown on the legendary Golden Gate Bridge?

Simple: Weta Digital, and lots and lots of ape-men in grey performance-capture pajamas. Watch how this film brought an imaginary war to life, in this exclusive behind-the-scenes footage from the DVD extras.

This clip is a part of the DVD's "Breaking Motion Capture Boundaries" featurette, which focuses in on performance capture technology (not motion capture technology mind you). Rise of the Planet of the Apes's Blu-ray and DVD will hit shelves on December 13th.