The deck is split into two halves representing two sides of a mirror. The top card of one half is turned over to show a 4. Therefor, in the other half should also be… a 4! Then, out of no where the other two 4’s appear! The 4’s are then lost back into the deck and it is shuffled face up into face down. Visably, the deck turns face up all except the four 4’s!