Fade Away by Stephen Tucker

This crazy expedition into the land of the pasteboards sees the caped crusader that's you, holding three cards. The top card is show and inserted into the central position. It now mysteriously rises back to the top. It is now removed and placed to the bottom to the trio. Once again it rises. How can it be? 

Easy...

You now show that the three cards are identical! But suddenly, the faces of the cards completely vanish and you are left holding cards with backs on all sides!!!