Yayo pretty much explained it. Fishing line hooked up to the ends of the untied laces, while you shake your leg, you raise your arms to do the "look ma, no hands!" gag which ends up pulling the loose ends up... shaking causes your pant legs to rise slightly to reveal the tied up laces hiding under.

Now you guys probably have an idea where the term "Black Box Voting" comes from.

Actually. Fox News is owned by the parent company publishing this book. So yeah, not only is it Faux News, it's thinly veiled advertising.