Anti-Trepanation Drill

I've heard horror stories from around the world where people have either performed self-trepanation or paid some cock-eyed doctor to do it out of the back of their car. Hopefully this invention will cure us of our desire to make our skulls look like an 8-lb bowling ball.

Have you seen the little toys in the store that when you touch a finger to one little contact point and another finger to the other contact point the toy starts to dance or sing or a combination of them? Well, this idea is similar to that. Have the drill bit made so that it slides all the way to the back of the drill. The end of the bit should touch one of the contacts, while the other contact is in the handle. If both contacts are being touched and a current runs through them (i.e. the head touches the bit, the bit touches the contact, and the contact in the handle is touched) then the drill doesn't turn on. Else, if the drill is place on wood, metal, plastic, neighbor's house, sister’s homework, what have you; the drill turns on and make a nice perforation.

Making the world a safer place for all of mankind. Sure, the ancients believed it helped cure stress, depression, confusion, and a number of other things… but can we really be sure this is the answer?