The Rolling Coaster

I scrambled down off the mattress to inspect the bedside nightstand and discovered a thick round slate drink coaster! It looked just like a mini boulder waiting for an adventure. I propped it vertically on its rough edge, planted both front paws on top, and gave it an energetic rolling push across the hardwood! Whoosh—it bowled straight ahead in a perfect wobble, rolling smoothly until it bumped against the curved chrome leg of the luggage stand with a sharp, hollow clack! It tipped flat onto the floor, spinning to a lazy stop right beside my toes. I held my breath, gave my tail a triumphant whip, and patted the cool stone flat with a happy thump!