A Brainwave Effect for any selected Word.
Here's the effect: Let the spectator name any word. This word might relate to the most important person in his or her life, thier first love, a product or even a company name.
Before they tells you the special word, you take out the Alphabet Deck that you prepared for this occasion and remove the cards from the pack. He shows a deck of letter cards, where every letter exists twice in it. As there are 26 letters in the alphabet, these two sets result in a full deck of 52 cards.
Remove these letters from the pack to build this name. Turn over the deck and spread it to show that you used a blue backed Alphabet Deck. Then turn over the removed card to show that all of them are red backed. A perfect and inexplicable prediction.
The deck allows both presentation; red cards in a blue deck as well as blue cards in a red deck.