Scientists in Japan, who apparently sit around all day coming up with awesome stuff, have invented a gun that jams the speech of people it's pointed at.

The device works by recording its target's speech then firing their words back at them with a 0.2-second delay, which affects the brain's cognitive processes and causes speakers to stutter before silencing them completely.

If I got my hands on one of those, I'd be firing it at all of the people all of the time.

Click here for more on what I'm call the STFU gun.