How to make the selected 2 cards appear on the top and bottom of the deck
  

Take the deck of cards and shuffle it in front of the audience, ask any viewer to choose two cards. Open the deck in the middle and ask the viewer to put the cards in the deck. Using the volt , move the selected cards up and make a false shuffle without changing the position of the top two cards. Then again, ask any spectator to choose two cards. Before you give the viewer to put cards into the deck, make a volt so that the second pair of cards is placed on the first pair. Then again use the volts and transfer 4 cards to the top of the deck, then make a false shuffle. Do the same with the third and fourth audience. To convince viewers that the cards are in different places in the deck, they need to give this deck for shuffling. Therefore, you need to hide the top 9 cards in the palm of your hand and give the deck for shuffle to any of the viewers. Then you need to say: "You all saw that the cards were put in different places and that the deck was shuffled, I do not know what the cards are, but I'll make them climb up on the top and bottom of the deck as they were chosen" . Show the last card to the audience and ask who from the audience chose this card. The audience is silent, since this card is really no one chose. Then you show the next card and repeat the question. At this point, insert the little finger under the next card and return the card to the deck, make a volt, then transfer these cards to the top of the deck. Then ask the person who chose these cards and show first the bottom card, and then the top card. While the map is showing, you again thrust the little finger of the left hand under the card that is under it. Putting the top card, do this place volt. Thus, the second pair of cards is distributed the same way. Then show the next pair of cards and to show the remaining pairs of cards everything is done the same way as the previous case. As a result, all the spectators who chose the cards, are convinced that the magician got exactly the cards that they chose.