Things You'll Need:
- two decks of cards
- an unseen assistant
- tape
- nearby window
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Step 1
Stand outside of a building with access to a nearby window. Give your helper a deck of cards and instruct him to tape the duplicate of any chosen card to the window (in a way the tape cannot be seen).
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Step 2
Position yourself and your spectator so that you face the window, and they cannot see it.
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Step 3
Riffle through the deck and have her pick a card. Instruct her to hold it up so you cannot see it. Your assistant will see it and simultaneously tape the duplicate to the window.
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Step 4
Have her put the card back into the deck.
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Step 5
Hand the deck to her and have her shuffle as much as she wants. This will ensure you are not doing anything tricky.
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Step 6
Take the deck back and fling it at the window. When all the cards fall down, her chosen card will appear on the window.
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Step 7
To show that it is on the other side, ask her to go get the card. When she goes to grab it she will realize and flip out.








