A Rolling Domino Cascade

I nudged past the coffee table toward the base of the tall bookcase, where a row of plastic dominoes stood balanced in a neat curve across the floorboards. Fascinated by their upright formation, I revved my round base and tapped the end tile with a firm bump. *Click-clack-clack!* The whole line collapsed in a rapid wave, clattering against each other until the last one slapped flat against the baseboard. Startled by the sudden clatter, my dome whipped around in a quick half-circle, letting out a delighted flurry of syncopated beeps as I rolled through the fallen white tiles.