Every magician gets asked if they use their magic to cheat at cards. Imagine the spectators surprise when you prove that you can actually use hypnosis to create a winning hand.
You start by asking the spectator to stare at four hypnotic designs that produce a very strange visual effect in your hands. Is this an optical illusion or are they under your power?
They will have even more doubts when you snap your fingers and the hypnotic cards visually change into four aces which you can show on both sides.
Your spectators will be stunned but you will never get an invitation to their poker nights!