Electric Shocks & Barbed Wire: The Psychology of Extreme Races
![](https://media.wnyc.org/i/800/0/h/85/1/154555299.jpg)
Participants go through the Kiss of Mud obstacle at the Tough Mudder event at Raceway Park on October 21, 2012 in Englishtown, New Jersey.
( Bruce Bennett / Getty )
( Bruce Bennett / Getty )
Produced by Amber Hall