It's the current (amps) that does the damage. Using water as a anology, think of amps being the size of the pipe and volts the pressure in the system. Here endeth the ( physics) lesson.For 120 volts at 2 amps to do that amount of damage he would have bad to been in contact with the charges d wore for quite a while. Electric fencers and cattle prods generally operate at considerably higher voltages , the current is in the milliamp range. To do that kind of damage would require a lot of current.