Double Back is quite possibly the most powerful transposition effect you will ever perform

A stimulating and inspiring glimpse into the mind of an artist

or complicated apparatus

The Foulard

Spiral Principle and Beyond | Stephen Leathwaite & World Magic Shop - (Download) Rasmus Double Back is quite possiblySpiral Principle The Spiral Principle is a new concept in magic that allows you to perform miracles with a borrowed deck of cards. Imagine having a spectator shuffle, select a card then lose it back into the deck. Without doing anything you instantly know what their card is and it's location in the deck. Included in the Download are 5 killer effects that would not be possible without the spiral principle including NAC, a hands off ACAAN with a twist