HypnoTrick by Ben Williams
With HYPNOTRICK a spectator can select a card from a deck and show it to everyone in his group before signing it. The performer then shows the second group the selection and they see a totally different card, despite there being only one card and it being signed across it's face!
The performer can release the spectators from their hypnotic state at any time, to show the true identity of the card. Oh, and the card can then be immediately inspected!
Now you can do all these things with Hypnotrick, a brand new effect from the creative mind of Ben Williams. With this knowledge and detailed photo illustrated routine you will be able to perform a whole range of effects from convincing people you are a master of suggestion techniques to doing a signed colour change using just one card and your bare hands. This effect could also be translated onto stage for a larger performance maybe in a mentalism act.
This is visual magic at it's best, not just 'another card trick'; this can be as powerful as you want it to be.