A Rubber Tap

My stretched fist suddenly twitched! Shishishi, it really moved! The smooth white table beneath my sandals felt super solid. Curious, I swung my curved, wound-up arm downward and gave the board a firm rap with my black knuckles. *Thump!* The sound echoed right against the pale wall! My toes gripped the flat surface as I laughed, totally ready to bounce.