If the cards are written by the audience in advance, the reverse forced selection technique can be used. For example, there are four cards, one of which is the signature card of the audience. After shuffling, four cards are laid flat on the table, which can be identified by shuffling skills or marking cards. Anyway, the magician must know the location of the signature card (what You said you didn't even know where you washed it? Go home, wash and sleep ...) Please specify two cards (be careful not to take them away). If there are signature cards in the two cards designated by the audience, take away the two cards that are not designated or put them in the coat pocket. At this time, there are only two cards left on the table (one of which is a signature card), and then the audience is asked to specify another card. If the audience designates an ordinary card and puts the designated card in the coat pocket, there is only one signature card left on the table. Anyway, the audience only needs to specify the signature card, and take away the ones that are not specified. If no signature card is specified, they will take the specified signature card and leave the signature card. In the process of performance, it is necessary to confuse the audience with language. For example, the audience first specifies two ordinary cards and says, "Please put the two cards you choose in your pocket", and the audience chooses the signature card and says, "Are you sure you want to choose this card?" If you are sure, let the audience open it themselves. If the audience chooses an ordinary card, say "Again, please put this card in your pocket", so that only the signature card is left. Don't be too absolute, such as "Are you sure about this card?" Replace it with "Are you sure this card is a signature card?" If you ask this question, the audience will go back on their word, and you will be tragic. Considering all kinds of situations, magicians must pay attention.
The above is just to attract jade, don't spray if you don't like it. The above also applies to the method of selecting signature cards among multiple cards. First, divide the cards into four stacks, let the audience filter two stacks, and then divide the remaining two stacks into four stacks. The same can be done, but not too many times. Identify your own signature card skills, T card, broken, small corner can be.
For related videos, please refer to the book selection part of Hu Kailun's "Return in triumph" teaching tape or Mao Zhenkai's "The Feeling of Impossible". Although the principle is simple, it is still difficult to implement it well, especially the language.
I don't know if the landlord wants this effect, even if it isn't, please clap your hands ~!