Willow Leahy stared at the tower of green plastic cups and flexed her fingers like a piano player preparing to tackle “Flight of the Bumblebee.” “This is called speed stacking,” she said. “Now, watch ...

Most sports are actually absurd. Golf involves hitting a tiny ball into a hole hundreds of yards away. Soccer is based on the idea of what if we didn't use our hands. Speed stacking — if you really ...