A spectator chooses a card randomly out of a deck of cards that has just been shuffled and inspected by one or more spectators. Without looking at the card and also making sure that no-one else can see the card it is placed into one envelope and sealed, and then placed into a second envelope and sealed.
After feeling the “energy” of the card through the envelopes (without ever touching them) the mentalist asks the audience members to think of a card and lock it into their minds. The mentalist walks through the audience with a hand stretched out and attempts to pick up the same vibrations emanating from the audience members minds as that of the selected card.