This effect takes a couple of classic principles of mentalism and melds them into an entirely new routine designed to bring jaw-dropping awe and admiration to all who witness it!
A participant freely thinks of a number of thoughts, such as words or dates. The performer writes something down on a business card and seals it up inside a small envelope. To make it even more challenging, the participant is instructed to focus on just one of those thoughts. The choice is randomly chosen.
The participant removes the business card form the sealed envelope and finds the freely chose though written in the message on the back. And, of course, this business card can be given away as a perfect and unforgettable souvenir of the performer's incredible abilities!