“Inevitable Choice” from Christian Grace allows a spectator to impossibly find their own card in a true “needle in the haystack” type moment that is surprisingly easy to perform.
Your participant is invited to choose a playing card from a pack they can clearly see has all different cards. It is then lost in the deck and the cards are shuffled. As you deal cards to the table, the spectator is invited to call “stop” whenever they’d like. This is repeated multiple times until you go through the whole deck of cards. Each time, they truly call stop whenever they want and you very cleanly put the card they stop on to the side.
You then work through the smaller packet in the same fashion until just a few cards are left. The spectator makes a choice from the remaining cards and, impossibly, it is their card. You don’t need to do any sneaky switches or steals. And they make all the choices.