SWITCH-A-LOPE (Gimmick and Online Instructions) by Arnaud Van Rietschoten - Trick
THE Ultimate 4-way-out envelope Imagine an ingenious envelope that will deliver the correct prediction, no matter which of 4 possible outcomes occurs! YOU ARE COVERED! Every mentalist needs a 4-way-out envelope! There any many available, but none allow you to do the following: Have the envelope sign