Japanese inventors have created a weapon to silence people expressing themselves.

The weapon works by playing back the talker’s words, with a 0.2 second delay.  The inventors discovered that such feedback of one’s own words will cause the speech center of your brain to lock up.

The inventors claim they did it to stop people who won’t shut up: “…some people tend to lengthen their turns or deliberately interrupt other people when it is not their turn in order to establish their presence rather than achieve more fruitful discussions.”