Ghostly Impressions

The performer displays a clear glass "playing card" that he claims can trap thought impressions, or the "ghost of the selected card"! A card is selected by a spectator from a deck. He is asked to concentrate on his card, and the impression of the card mysteriously appears on the glass in a ghostly fashion, then vanishes, leaving the glass completely clear once again. You could repeat the effect immediately if you wish with a different card.