This reminds me of the cigarette gun, and the lipstick gun I saw on the History Channel show about spies during WWII. They mentioned the little guns don't do much more than distract whoever you shot it at, but since you were trying to not be captured, you just used the chance to grab the bad guys gun. Liberators were probably more effective, if not as easy to conceal. Neat idea, though. If I had extra money, I would buy one just to have.