Effect:

With the help of a random member of the audience, four piles of cards are presented. All four aces will be shown once all the piles are flipped over.

Preparation:

Deck is to be arranged with an ace on the top, and the other 3 aces at the bottom.

Procedure:

1. Ask a random audience to say "stop" as you are putting down the cards as they are faced down. This will give you the first Ace card that was on top of the deck, it is now at the bottom of the first pile.
2. Then, secretly remove one ace from the bottom and put it at the top of the remaining deck.
3. Repeat the same procedure again, until you have been through all four piles.
4. Finally, flip over all four piles and there will an Ace at the bottom of each pile.