Guess card

Ask your friend to shuffle the deck. You will then take the deck and show the bottom of the pack to the friend with the four of hearts on the bottom without looking at the bottom of the deck.
You will then take the deck of cards behind your back and tell the friend what the next card on the bottom will be ( e.g. nine of diamonds ) - without looking at the bottom at all!
After holding the deck of cards behind your back you show the deck again with the predicted card on the bottom. And you can repeat this a couple of times.

PROCEDURE
When you hold the deck behind your back you will turn the card which is on top of the deck. When you show the bottom of the deck to the friend, with the four of hearts on the bottom, you will be able to see which turned card is on the top of the deck ( e.g. nine of diamonds ). After taking the deck behind your back again you will take the turned card on top of the deck ( nine of diamonds ), turn it and put it on the bottom. At the same time you will turn the next card which is on top. When you show the deck to the friend with the predicted card, nine of diamonds, you will be able to see the next card ( e.g. king of spades ).