This came from an old magician’s estate. The bridge-size cards are used but the gimmick still works well. Comes with the original instructions. Copyright 1978.
Effect: The magician displays two playing cards with their backs toward the spectators. He then places them face down under a glass, and states that these two cards are his prediction. Spectator then selects two playing cards from a deck. Magician states “When I lift that glass those two cards are going to jump into the air, flip over, and when they land you will see that they match your two selected cards.” And sure enough when the magician lifts the glass that is exactly what happens!