JIGGLEY PUFF WHAT HAPPEND TO YOUR HANDS

A wide white ceramic mug rested near the desk lamp, deep and completely empty. I planted both feet firmly against the grain first. Sturdy balance secured! Then I leaned right over the smooth glazed rim and released a crisp, steady hum. *Woom!* The hollow chamber captured my note, rolling it around the curved porcelain walls and humming it back twice as round! I stood frozen, waiting for the resonance to settle in the quiet room. Did the shape bend the pitch upward?