Unlimited Sneak Peek ft Repeat Sandwich by Christopher Williams.

The deck is shuffled and cut by the spectators, making everything feel completely fair from the start. Two Jacks are removed and placed aside before a card is freely chosen, signed and returned to the pack. With no fuss, one card is seen face down between the Jacks that were isolated before the selection was even made — and it is the signed card! The effect is then repeated even more openly, with the signed card once again vanishing from the deck and appearing instantly between the Jacks.