A Twitch in the Fingers

Whoa, hold on! My fingers just did a full twitch on their own. I pushed down against the soft, bumpy rug, and my whole arm actually moved! Right beside me, a sleek black cord was snaking across the carpet like an uncoiled web line. I reached over, nudged the smooth plastic tip with my mittened hand, and watched it slide a few inches. No villains in sight, just a quiet wire on the floor, but my reflexes? Totally operational.