A knot instantly ties itself at the end of a handkerchief!

 

REQUIREMENTS: One cloth handkerchief with a knot tied in one corner.

 

Tell your friends that you can tie a knot in a handkerchief using only one hand!

 

Pull the handkerchief out of your pocket, keeping the knot hidden in your

hand. Pick up the opposite corner of the handkerchief with the other hand, and grasp it.

 

Snap the handkerchief, releasing the end without the knot. Pick up the hanging end with the other hand as before and repeat, again releasing the end without the knot.

 

On the third try, let go of the knotted end, instead of the expected corner. The

movement of the hand conceals the switch, and makes this a very baffling effect.