Can Grownups Do the Floss?

Russell Horning, aka "The Backpack Kid" known for his performance of the floss, says adults just don't have the coordination or the flexibility to do it right. We asked a choreographer to put some families to the test. Video/Photo: Mark Kelly/The Wall Street Journal

from WSJ.com Video - Most Viewed WSJ Videos 7 days https://ift.tt/2NOmIbP