Magic Card Stab requires a little bit of preparation. This does not however mean you can't perform it spontaneously! You can even perform it with a borrowed deck of playing cards.

I'm writing this assuming you own Magic Card Stab and are familiar with the secret move. If you don't own MCS, this might not make much sense.

Step 1
Have the cards shuffled.

Step 2
Say something like, "lets find a good card" then thumb through the cards (faces towards you).

Step 3
In the process of 'looking for a card', secretly cut the deck at the right place for the trick.

Step 4
Finally say "actually, this would be better if you chose the card". Proceed with the trick as per the instructions.

To the spectator it will simply look like you changed your mind about who should choose the card.

Tags: magic card stab, pro tip, secret move explained, special