Box Monster by Nate Kranzo

Imagine this: a spectator freely chooses two cards from a deck—no forces involved. After placing the cards back into the center of the deck, the deck is returned to its box and closed. At first glance, everything seems ordinary.

However, without any suspicious movements, the card box mysteriously opens on its own. One card begins to rise slowly and visibly from the deck. You gently grasp the card and pull it out, revealing it to be the first selected card. You’ve successfully executed the first part of the effect!