Tough Guy claims to be the world’s most demanding one day survival ordeal.  Taking place in mid-winter (at the end of January) and summer (at the end of July) in Perton, England, Tough Guy consists of an eight country mile run followed by an assault course which includes challenges such as crawling under barbed wire, running over burning bales of hay, swimming in underwater tunnels and crawling through underground pipes. At various points on the course and throughout the day, competitors are encouraged to shout “Yohimbe!”, Zulu battle cry meaning “My dick’s bigger than yours”