A spectator mixes a card deck in his back. Lorsqu' it wishes it, it s' stop and makes a cross on the back of the higher chart of the package, with l' d' helps; a marker. The magician recovers the marker and makes a prediction on a bit of paper. The spectator is invited to cut the play and to seek his chart. Incredible, the marked chart d' a cross corresponds perfectly with the prediction of the magician.