Your thinking all the time Rick and first time I ever heard of drills like this, ideal in that the one receiving seems to control the level of inflicted pain.
My own observation on how much pain a person can take is environmental, it may also be genetic who knows.
Best example I can think of is a student we had years ago, Ian worked in a family logging operation and injury was excepted part of "gettin the trees out". One class I was doing leg conditioning with him and after sometime he asked if I could go lighter so the stiches would hold, his leg I discovered had been hit by a chain that let go during a drag and along with severe brusing some laceration took place on the shin area. He told me he still had to "eat" (work) "so a little karate stuff ain`t nothin" . Pain was simply part of living to Ian and how much we can tolerate I think is based on attitude as much or more than physical conditioning. Our experiment continues...
