Has there ever been a study done on humans being shocked? Certainly somebody must have done that kind of thing long ago. I've seen those machines with two brass handles, you're supposed to hold the handles and the machine shocks you with more and more intensity until you either let go or somehow "win" - I guess it maxes out at some predetermined point. Sounds dangerous to me, since from one hand to the other, it goes through your heart. I wonder if there was ever an experiment to see how much voltage it takes to "shock" somebody, if the voltage was fed through a variac. Where does a person start feeling a tingle? Where does a person start feeling shocked? Where does a person get jolted and burned? Killed? Was there ever a study done where people might know something about this?