This Hypnotic Machine Perfectly Juggles a Ping-Pong Ball By Listening to the Bounce

Bouncing a ping-pong ball on a paddle isn’t terribly challenging for someone with even a modicum of hand-eye coordination, but what if you were blindfolded and had to only rely on your ears? That makes the challenge almost impossible, but unexpectedly it turned out to be an effective approach for this ball-juggling contraption