Red Six Red Nine
This is a very deceptive trick that's easy to do.
Effect: Magician removes a red six and a red nine from the deck. These are then placed randomly back into the deck. The deck is shuffled and the magician throws the deck from the right hand to the left. Two cards are seen remaining in the right hand. They are revealed to be the red six and the red nine!
Preparation: Place a red six, (Six of Diamonds) face down on the top of the deck and a red nine (Nine of Hearts) face down on the bottom of the deck.
Presentation: Remove the Six of Hearts and the Nine of Diamonds from the deck and show them to your audience. Refer to them ONLY as a red six and a red nine. Replace them randomly in the deck. You may shuffle the deck at this point but be sure to leave the top and bottom cards undisturbed. Place the deck in your right hand with the thumb on the top and the fingers on the bottom. Squeeze the deck gently and then throw the deck into the left hand. The top and bottom cards of the deck will remain in your right hand. Reveal these to be the red six and the red nine!
Note: This trick "works" because 99% of your audiences won't realize that they are not seeing the SAME red six and red nine. As long as you do not mention the suits, no one should catch on to the secret