Earlier today a friend of mine was showing me one of those self defense taser baton things he had purchased...sizable violet-blue spark authoritatively crackling on the end prongs. Admiring the lightening on the end of the device I securely wrapped my other hand around the "trigger" guard in which there were two more prongs spaced about an inch and a half apart. Up to that point I wasn't aware what that decoration was for, but after 4 hours I can just about flex my fingers now...:0