The What
The magician hands out many packets of the deck to his audience to shuffle. Everybody shuffles. The packets are reassembled into a full deck. The deck is shown to be completely and thoroughly shuffled. Everyone is asked to take a mental snapshot of the well-mixed deck. Spectators then take random groups from the deck, shuffle them, and then put down a pair of cards into a pile on the table. The remainder of the cards are discarded. This goes on until the deck is exhausted. The cards the spectators selected and then turned over to show they have separated themselves into the