Wild Surprise (Bicycle) - Trick

The spectator selects a card, but doesn’t look at it yet. The card is put aside.
Then the magician says the cards are prediction cards and shows 4 of the same cards (in a spread, no funny counts) say the king of spades (showing the front and backs).
 
The Kings should match the selected card. When the selection is turned over, it's eight of hearts!
 
The magician (one by one) changes the kings to eights.

After the change the magician shows all four cards in a spread, fronts and backs.
 
Buyers receive a DVD instruction and the necessary gimmick cards (Bicycle).