There is an old, old trick one can do with a rope or scarf (best) that allows you to shake it around (untied) until it ties (apparently) itself. This was a great bar trick back when we were out looking for a little 'action' on Friday nights, lol. "Can I borrow your scarf for a minute, miss?"
But just using his foot wiggling, this guy doesn't have the kind of control necessary. I think BMX is right.