First you must answer 1 question about Japan. Is the answer japan?... Yes.

This is kind of amazing, but my question is who's idea was it to invent this? Was it intentional? Did someone decide you know what the world needs an anti-talking ray? Or were they working on something else, or was someone just goofing around and to play a joke on his friend created something to shoot his words back at him? It seems like the joke idea makes the most sense. It would be a funny prank to start with, but after it turns out the person can't speak it becomes double funny. Also i would be a little concerned about the long term affects of messing with the brain like this, but it would be nice to have sometimes.