Mad World by David Cushing

''Completely let go of the "Out of this World" effect.

The magician removes a deck of cards from the box. One half of the deck is laid face down on the table and the other half is spread face up. The spectator then pushes the two halves together. To make sure the cards are completely mixed, the spectator is encouraged to turn the pile face up and face down until they are satisfied that the cards are truly mixed. Two cards (one red, one black) are removed as signposts for the upcoming demonstration. The spectator is then asked to look at both sides of the mixed deck in an attempt to take a mental snapshot of the deck face up and face down. Considering the chaos of the deck, the spectator begins to divide the deck into two piles in an attempt to separate the red cards from the black cards. Without any conversion or intervention from the magician, the spectator is asked to flip each of the two piles. Amazingly, they succeed in separating each red card from each black card!

Note the following:

-From the moment the spectator receives the deck, the magician no longer needs to touch the cards!

-The cards can be literally shuffled in any way possible.

-Each black card is separated from each red card

-No stopping in the middle

-The spectator makes every choice

-The magician never touches the deck from the moment the cards are shuffled to the final reveal

-Comes with bonus handling

-Works completely automatically