Magic Shoelaces!

My shoelaces are magic because no matter how I tie them, they come undone.  Even if I double-knot them, they come undone in no time.


Upon close examination, I discovered they are magic! They are "gimmicked" as a prop for a magician's trick. You know the trick where Pronto cuts a string in half and it magically reunites itself?


Now we know how Pronto does it.