A member of the audience selects and places a blank card into an envelope that the magician has produced.
A card is then selected from a standard deck of cards and held by the audience member.
The magician explains that the envelope is actually a new hi-tech experi-mental camera. He claims it can take a snap shot of the mind and attempts to demonstrate this by asking the audience member to concentrate on his chosen card. This first attempt fails but only because part of the camera is missing. The missing part an image of a camera front is discovered by a member of the audience and placed on the envelope.
The magician takes the photo again but this time when asked to take out the card in the envelope the audience are astonished to discover that it has actually developed into the chosen card.
> The envelope remains in view at all times.
> The cards are only handled by the audience.
> The inside of the envelope is fully exposed to the audience.
> The putting in and taking out of it's contents is done by the audience.