Echo in the Mug

My ears were buzzing for some real sound, so I hopped down from the stage setup and wandered across the coffee table. Right there lay a heavy ceramic mug tipped on its side. I leaned my whole head right into the hollow opening and gave a sharp whoop. Whoa, the echo bounced straight back, deep and resonant like a mini arena! I dragged my guitar pick across the rim, letting the ceramic ringing hum right through the dark room. Best backstage amplifier ever.