Magician shows an empty photo frame. There is absolutely nothing unusual about the frame; it’s just an ordinary frame.
The magician asks the spectator to choose one card and sign on it.
The signed card is returned to the deck and shuffled.
The magician allows cards to spring up and out of his hand so they bounce against the frame.
But then as they fall back, we can see the cosen & signed card appears inside the frame.
The back cover is opened to show the card definitely has penetrated a solid glass in order to appear inside the frame.
