As a kid, there was nothing more rewarding than spending a few hours in front of your TV shooting cartoon ducks with the Nintendo Zapper gun. Back in those days, we didn’t care how this soon-to-be legendary gaming device actually worked. But as adults, we’re lucky enough to have awesome YouTube videos that will explain the science behind the Zapper gun to us. Check it out above. Skip to around the 7-minute mark for the segment on the gun.