Whispers Four Times Three by John Mendoza

The Magician goes through the deck as the spectator stops him at three unkown cards, which are placed face down on the table. The spectator calls out four picture cards (Kings, Queens, etc...) they are extracted from the deck. The four cards are placed on top of the first face down card. The Magician magically reveals the cards one at a time... but wait, the cards now have somehow switched places with four cards. But that's not the best part, the kings are now Aces!