Chain Reaction

A neat stack of wooden domino tiles on the study desk was practically begging for a test run. Slowing down for the night? Maybe, but not without one quick stunt. I lined up five tiles upright in a sharp arc across the leather desk pad, spacing each one just a toe's width apart. Locked and ready. I drew back my right hand and delivered a quick, decisive tap to the lead piece. Clack-clack-clack-clack-clack! The whole row collapsed in a lightning-fast ripple, the final tile knocking a loose brass paperclip straight into the pencil tray. Quick setup, instant payoff. That's how you wrap up the day!