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Zombies chase runners during "Run for Your Lives" 5k race

Brian Snyder / Reuters

A zombie chases a runner on the "Run for Your Lives" 5K obstacle course race in Amesbury, Mass. on May 5.

"Run for Your Lives" 5k zombie races pit runners against man-made and natural obstacle courses and zombies, who chase them down and try and take "health" flags off the runners belts. Learn more about the races at runforyourlives.com.

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Brian Snyder / Reuters

A zombie greets runners arriving for the "Run for Your Lives" 5K obstacle course race in Amesbury, Mass. on May 5.

Brian Snyder / Reuters

Runners are chased by a zombie at the "Run for Your Lives" 5K obstacle course race in Amesbury, Mass. on May 5.

Brian Snyder / Reuters

A zombie waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Mass. on May 5.

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