A man and a young boy use the cargo net to climb out of a water obstacle during the annual Marine Corps Marathon's Mini Run Amuck. Run Amuck, the Marine Corps Marathon's messiest mud and obstacle event, hosts 4,000 runners who face arduous obstacles and plenty of mud along a 4 mile course on June 14, 2014, throughout Marine Corps Base Quantico, Va. (U.S. Marine Corps photo by James H. Frank/Released)