Intensity fuels Missouri wrestler Mike Larson

Saturday, March 10, 2012 | 7:27 p.m. CST; updated 9:11 p.m. CST, Saturday, March 10, 2012

COLUMBIA —  There is a type of person who feels a need to test the limits of what conventional wisdom says the human body is capable. Back-country snowboarders, free climbers and base-jumpers crave the rush of being one step from death. It allows them to feel most alive.