How to nail wood in poker?

The performer takes a deck of ordinary poker and shows it to the audience. Let an audience draw a card from it so that the performer can't see it. After the card drawer sees it clearly, he will insert the drawn card back into the whole set of poker. The performer immediately put away the cards, shuffled the cards several times, and then turned to the table. He took out a thumbtack from the thumbtack box and gave it to the audience who had just drawn cards, and he randomly placed the thumbtack in the middle of a deck of cards to pick up the cards temporarily without damaging them. At that moment, I saw the performer holding all the playing cards in his right hand, approaching a board standing on the left side of the platform in advance and throwing it up hard. Bang, the cards fell one by one, but there was a poker nailed to the board, and its design idea was exactly the same as the one that the audience had just drawn.

When the audience pulls out the card to see the idea, the performer divides the lower part of the card into sectors and prepares to insert it back. At the moment of inserting the card, use the middle finger of the right hand to quickly lean against the edge of the card, and the hands will be completely closed immediately. At this point, there is a gap between the inserted card and the next adjacent card. Because the middle finger of the right hand is stuck, the left hand holds the card and the right hand pulls it several times, and the card is pulled to the top. After shuffling, I still stay on it. When you turn to get the thumbtack, quickly take out a thumbtack that was put in the seam of your skirt in advance and put a playing card on it from front to back. Because the tail of the thumbtack is small and covered by the palm of the left hand, it is difficult for the audience to see the flaw. When throwing a card at the chessboard, the back of the card faces the chessboard.