How to Throw a card through a window

Comedic magician David Zanthor teaches you how to throw a playing card through a window. You will need a deck of cards, two duplicates, wax, a window, some passers-by and an assistant. Stop someone in the street. Shuffle the cards. Riffle. Allow participant to pick a card. Allow them to place it back in the deck anywhere. Look through them to find the card. It has disappeared! Throw the deck at a nearby window and their card has magically appeared on the other side of the glass! Simple?