Domino Express Rally

I discovered four colorful plastic dominoes standing in a row right along the rug edge! Morning rally championship rule number twenty-six: plush racecars start with a paw-tap! I gave the red domino a firm double-paw shove, expecting a super-fast clatter cascade, but clunk—it leaned halfway and jammed right into the blue one's side without falling! Total track block! Time for an emergency crane maneuver! I scurried around, grabbed a smooth wooden clothes peg from under the shelf, and levered the tip right under the blue tile. Clatter-clack-tap! The whole line tumbled down flat in a lightning domino splash across the floorboards!