The following is a slightly easier way of performing this magic trick – but with just as much flair ….
How to Perform the Card Through Window Card Trick
To perform this stunning card trick you will need the following: a deck of cards, a pair of duplicate cards (eg. 2 x Ace of Hearts), a little magician’s wax (or beeswax will do just as well) plus an assistant or helper.
Performing the magic trick
Stop a passer by in the street and tell them that you like to show them a spectacular card trick. Quickly cut the cards and give them a good shuffle. Explain to the Spectator that you are going to riffle through the cards and that you would like them to tell you when to stop. Proceed to do this and allow them to take a card. If they are with someone, ask them to show their card to their friend. Let’s say, for example, that they choose the Ace of Hearts. Ask them to replace the card in the deck anywhere they like. Now give the cards another good shuffle and look through the cards but tell them that you can’t find their card which seems to have vanished. Next, all of a sudden throw the cards at a nearby window. Your spectator will be astonished to see that their card has now appeared on the other side of the glass as if by magic!
NOTE: In the video above of David Blaine performing the card through window magic trick, he forces the 8 of Spades onto the spectator. This is probably done by having a small stack of identical 8 of Spades cards on top of the deck which he later removes after forcing the card and whilst the spectator is showing his card to his friends.