Wonderland Dollar video
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The magician openly displays a one dollar bill with a small "trap door" cut into the middle. He asks a spectator to hold the trap door and proceeds to somehow fold the bill closed, then open it up again. When the bill is unfolded the trap door seems to have jumped to the other side of the bill! The only way the effect seems possible is if the magician somehow went through the small cutout door in the bill.
Includes specially cut US One Dollar bill and instructional video (available in NTSC and PAL Format, please specify when ordering.)
Brad Burt's Magic Shop