Spinning on Ball Bearings

I scrambled out the garden gate and marched straight over to the park's outdoor fitness station! Bolted onto the concrete sat a low steel waist-twister disc sitting on heavy internal ball bearings. Whirrr! I hopped onto the textured metal plate with both chunky feet—shhh-spin! It rotated half an inch before jamming tight against a gritty rim seam. No problem! I dropped low, wedged a smooth river pebble from the gravel path under the outer edge to lever it free, and gave the rim a mighty push with both padded fists. KA-WHIRRR! The bearings broke loose into a roaring, rolling spin! I jumped back on, riding the metallic turntable in dizzy circles!