Framed

A large envelope is shown, and it's explained that a prediction is inside. A card is chosen, and the magician says the prediction is correct. The envelope is opened, and inside is a transparent acrylic block with all 52 cards printed in full color, faces on one side and backs on the other. After the gag (as if it's a 52-in-1 card), the magician asks the spectator to place their hand on the face of the chosen card. When they remove their hand, the card is now showing its back, and most importantly, everything can be inspected immediately.