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Fan a small packet of the deck and place the spectator's card within. Then, place the packet into the center of the deck. Their card will remain on top.
Control the spectator's card from the middle of the deck to the bottom.
Dribble half the deck onto the spectator's card, loosing it somewhere in the deck. Their card then ends up back on top.
After loosing the spectator's card within the deck, control it to the top.