Effect

The magician shows a real CD to the audience and places it into the left side of a plastic case

The CD then disappears from the case. Of course, the audience believes that they know the trick - that the CD simply rolls from one side to the other since this is clearly visible through the transparent strip in the center of the case. Then comes the big surprise. The magician opens both doors of the plastic case and it is completely empty. The magician then produces the CD from his pocket.\r