Out of the Blue by Mick McCreathYour spectator selects some numbered cards and can change their minds of their card selections as many times as they want. In the end, they will find that your prediction matches the total number on their freely chosen cards. Here's an amazingly versatile mindreading effect that will astound your audience. You show your spectator some cards with different numbers printed on both sides. None of the numbers are repeated and nothing is hidden or changed;