Watch the World Yo-Yo Champion Put on a Routine That Will Mesmerize You

The World Yo-Yo Contest had more ups and downs than this joke did groans, but it still brought out the best of the best in the surprisingly advanced art of the children's pastime.

Check out Gentry Stein, this year's world champion. His performance is nothing short of astounding.

And you thought you were cool because you could do that lame walk the dog trick.