Double Color Prediction (Metal) by Sorcier MagicA small playing card sized metal plaque is shown to the audience. Three holes are made on it corresponding to three different colors, yellow, green, red. A spectator is now invited to take two bolts and two nuts and fix them into two holes, the third hole remaining free. Attention is drawn to an envelope left on the table all the time. It is a giant plaque (approximately 25cm x 16cm) corresponding to the plaque delivered to the public. In fact, once