Skipton, North Yorkshire, UK. 2nd Aug, 2014. 5,800 participants are taking part in the Tough Mudder challenge on the Broughton Hall Estate, just outside the North Yorkshire market town of Skipton. The fourth obstacle on the course is the Boa Constrictor which requres participants to crawl through a tunnel into a pool covered with barbed wire and out via another tunnel. © Tom Holmes/Alamy News Live

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Photo credit: © Thomas Holmes / Alamy / Afripics
License: Licensed
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