A spectator-selected card turns face-up in the deck.
Have a spectator freely select a card from a deck. There is no force. The spectator remembers the card. The magician inserts the card into the deck. When the deck is fanned the card has turned face-up (or face-down if you are showing the deck from faces.)
You will need to be able to do a half-pass. A short card helps in the sleight-of-hand proceedings.
1st edition 2023, video 13:38