This might make muggers think twice, although there is no way it would ever be sold in the UK...I am also a little worried about putting a 640V device to my face....I can see the headlines " iPhone owner stunned by his / her own phone" As a concept though, they may be onto something..If they can provide enough power for a stun shot, I wonder what else they could do with it? Might be potential for other spin -off products here.