A common shuffling technique is called the riffle , or dovetail shuffle or leafing the cards , in which half of the deck is held in each hand with the thumbs inward , then cards are released by the thumbs .
Cards fall to the table interleaved .
A common shuffling technique is called the riffle , or dovetail shuffle or leafing the cards , in which half of the deck is held in each hand with the thumbs inward , then cards are released by the thumbs so that they fall to the table interleaved .