Hold a deck of cards deep in one hand with the long edge of the deck parallel to the floor. Position the other hand below the deck with the palm upward.
Gently squeeze the deck until the cards bend slightly toward the palm with small spaces between each card. The card edges will start to slide along the thumb and fingers, almost ready to spring out.
Relax the hand holding the deck and allow the cards to fall, one at a time, in an even ribbon to the other hand. Catch the cards with a cradling grip in the lower hand.