Guns, when we guns, what comes to our mind first? Of course "dangerous". Guns are designed and develop to destroy, a person who possesses a gun looks scary, dangerous and powerful. Even the countries that create more guns and other related merchandize are look powerful and scary. But is it possible to create an unharmful gun? A gun that can't kill, a gun that can only teach someone lesson but can't kill, can hurt but can't kill? Is it possible? Maybe if its possible, maybe we can live peacefully, there will be no war, there will be no misfiring, there well be no danger. If only it's possible.