Http://www.penguinmagic.com/p/11547

My new download is now available at Penguin Magic.

The four Jacks are removed from a borrowed, shuffled deck of playing cards. A card is then freely chosen and signed by a spectator. The signed selection is set aside while the four Jacks are undoubtedly placed face down into four different spots in the face up deck. When the signed selection is picked up, it is now shown to be the four Jacks! The chosen card is found reversed in the center of the deck where the four Jacks had been only moments earlier. A baffling four for one card transposition!

"Well structured and simple to do. You'll also learn some useful subtleties. Kahn's approach to magic is similar to that of his medical career - prescribing solutions that breathe new life into classic card magic."
-John Guastaferro