Hackin' The sneaker: Make a Knot that's Almost Impossible to Untie

The Constrictor knot is a binding knot that can be almost impossible to untie. An even stronger knot than that is the double Constrictor knot. It's pretty cool because the two knots bunch up onto each other, causing them to jam. If the ends are small, or if the jam is bad enough, it's practically impossible to untie without cutting the string.

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