article_snippet: More than 10,000 adrenaline junkies took on 'America's toughest obstacle course' in California  on Sunday with a photographer on hand to document their pain-stricken faces.
article_snippet: Hair-raising: More than 10,000 adrenaline junkies took on 'America's toughest obstacle course' in California on Sunday with a photographer on hand to document their pain-stricken faces - here a man screams as a man is shocked by electric wires .
highlights_snippet: On Sunday thousands flocked to  San Bernardino in California to take on the challenge .
  