The "Wisconsin Winter Stack Up" hosted some of the country's fastest cup stackers. Sport stacking is a competition in which competitors stack specially designed cups up and down in set patterns. Speed ...

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.

North Adams -- They stacked. Collapsed. And stacked some more. Cups. Plastic cups. And they did it for a world record. For 30 minutes Tuesday, close to 70 locals led by Doug Greenlaw joined the World ...