When Trey Griffith found his first set of stacking cups, his life was changed forever. He began training himself to rack and stack cups at lightning speed, competing in tournaments around the globe.

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Editor's note: This segment was rebroadcast on Sept. 30, 2025. Click here for that audio. In the early 2000s, thousands of U.S. schools had their students race the clock to stack cups in gym class.