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Zombies! Run!

Runners emerge from the smoke house on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. Runners face man-made and natural obstacles on the course, while being chased by zombies, who try to take "health" flags off the runners belts. REUTERS/Brian Snyder

Runners emerge from the smoke house on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. Runners face man-made and natural obstacles on the course, while being chased by zombies, who try to take "health" flags off the runners belts. REUTERS/Brian Snyder

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A zombie chases a runner (L) on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie chases a runner (L) on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Zombies wait to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Zombies wait to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie holds a doll in his mouth on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie holds a doll in his mouth on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Zombies chase runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Zombies chase runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie (top) and a runner go down a water slide at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie (top) and a runner go down a water slide at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Zombies chase a runner (R) into a pool of water on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Zombies chase a runner (R) into a pool of water on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie chases a runner (R) on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie chases a runner (R) on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Runners are chased by a zombie (C) at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Runners are chased by a zombie (C) at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie lands in a pool of water on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie lands in a pool of water on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie in nun's clothing chases runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie in nun's clothing chases runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Fake blood drips off the hands of a worker creating the look of zombies at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Fake blood drips off the hands of a worker creating the look of zombies at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie checks her make-up in a mirror before chasing runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie checks her make-up in a mirror before chasing runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Zombies wait to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Zombies wait to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Zombies walk off the course after chasing runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Zombies walk off the course after chasing runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Two zombies wait to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Two zombies wait to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombies waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombies waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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Zombies chase runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

Zombies chase runners on the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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A zombie waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

A zombie waits to chase runners at the "Run for Your Lives" 5K obstacle course race in Amesbury, Massachusetts May 5, 2012. REUTERS/Brian Snyder

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