Janus Deck, Force Play | Edward Stein

You clearly show a complete poker deck of exactly 52 different cards (each card is shown once), shuffle them, and hold the fan out to the spectator. They pick out any card at will, and it's your predicted card.

Or a spectator calls out a number from 1 to 52. You actually count (without any trickery) to exactly that position and land on the force card. Or the spectator spontaneously stops counting whenever they want. It doesn't help them!
If you've avoided forcing a card because no method has truly convinced you, here's the ultimate solution. No rough-and-smooth, no trimmed cards, no thick or thin cards, no dexterity, no problems!

With the Janus Deck, you can even force two different cards in quick succession.
The 20-page manuscript describes in detail the application and many possible uses.

You'll love this game. It makes forcing fun!