David Blaine’s Two Card Monte
The setup is red ace, black queen, black queen and red ace. You can do this under the guise of looking for a particular card.
You create a break under the top four cards, then slide off the top card which is a red ace and give it to the spectator. You then triple lift the three cards to show the other red ace.. After this has been accomplished, you then flip them back over so you can take the black queen and swap the red ace the spectator is holding for the black queen.
You then perform a top change where the red ace in your hand is switched with the remaining black queen on the top of the deck. You do this by sliding out the black queen slightly on top of the deck and feeling the red ace underneath at the same time taking the black queen leaving the red ace behind.
All that is left to do is to let the spectator reveal two totally different cards.