I bet you must have seen the 'card through window' trick before. Believed to have started from John Kennedy, most of the well-known magicians like Chris Angel, David Blaine and Cyril Takayama have performed it.
The trick itself has become complicated and varied. To make the trick more real, magicians have used different ways such as asking the spectator to sign on the card, performing in front of the window and even putting the hand across the window to retrieve the card and etc.
Here's 4 video clips on this trick. Clip 1 shows David Blaine in action. Clip 2 and 3 provides explanation of how its done. And Clip 4 shows what will happen when the trick goes wrong :)
Clip 1:
Clip 2:
Clip 3:
Clip 4:
