Natural and man-made obstacles studded the course of a Philippine race, but the real danger to the thousands of runners came from the hordes of "zombies". 

About five thousand people dashed along the five km (three mile) course of the survival-themed race in Laguna Province, about 38 km south of Manila, dodging an assortment of the walking undead in the contest based on a popular U.S. race.

Two hundred actors dressed as post-apocalyptic zombies hid behind trees, bushes and rocky uphill climbs along the five km (three mile) course to surprise the unsuspecting runners and symbolically feast on their brains by stealing flags attached to the runners' waists.