The magician shows the spectators an empty black velvet bag and a framed prediction card (10 of Spades for example), which is sealed between two plexiglass sheets.
He puts the prediction into the bag and puts them on the table, fully in sight of the spectators. He then shows a deck of cards to the audience, all the cards being the 10 of Spades.
"I just want to make sure the tricks succeeds!" - he explains.
Ha asks one of the spectators to draw a card "fully free" and hold it close to her.
The magician takes the framed prediction out of the bag and he turns it face up, together with the spectator's chosen card.
Both the selected and and the prediction transformed into the 4 of Diamonds!
The spectators can inspect the framed prediction right away, the 4 of Diamonds can't be removed from its frame!