because Geoff's execution was easy and natural perfection

they are the three selections

happens every time

The card routines alone can be used as a metaphorical model for any non-card demonstration

As for the material

Ominous Deck (Spider) | Diamond Jim Tyler Eric C. because Geoff's execution was easyTwo different people select cards, and these are mixed into a regular poker sized deck. The deck is given to someone to hold between their hands. The magician reaches into the deck that's between their palms and miraculously retrieves both selections. He then states that he will take the whole deck from them without anyone knowing. The spectator clamps down tight on the deck to prevent this. The magician shows that he has the deck by producing one