The RPG Deck By Red Tsai and Horret Wu is a piece seriously genius thinking.
Imagine having your spectator select and sign a card. The card is lost in the deck and the deck placed onto the table.
You now borrow a coin or use your ring or even a credit card, lay it flat on the table and then flick it at the deck. As soon as the coin hits the deck the top half of the deck somersaults off the pack leaving the signed selection on top of the remaining half.
Use this as a revelation of a 4 ace production. The RPG is visual eye candy. You will love it!