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Start a magician to find the four cards on the table from a deck of cards. The remaining cards in the audience pick a card and signed (no force). Four cards on the table in the first three were followed accurately predict the audience selected card color, parity, head or number, and the fourth card, the audience is actually signed that card name, the audience really surprised It came down to the chin

God's work is big, too clever way, and it does not require props in any way, nor need to be prepared to achieve the effect, can completely improvised performances, highly recommended ...