The Seventh Episode of the Johncast!
Here is the riddle's answer: The man juggles the balls, having one ball in the air all the time!
Credit to Kevin MacLeod for his awesome music from Incompetech, including Overworld, which I used in this episode.
"Upbeat Forever","Voice Over Under"
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0/
Thanks to audioblocks.com and orangefreesounds.com, for the awesome sound effects and music.