The Silent Treatment by Jon Allen is the effect that Jason Alexander performs in his Magic Castle act.
This is one of those perfect openers. You walk onstage and say nothing. You simply open a flip book that introduces you. Through only words on the signs, you communicate with the audience in an hilarious way, and have a card thought of. The big finish? You remove the thought-of card FROM YOUR MOUTH!
This is not difficult at all, and sets the right tone for your stand-up show. It shows that you’re funny, that you have showmanship skills, that you will do amazing things, and that you are a different kind of magician. This prop is an investment in your show, and one of the best close-up and stand-up tricks to come along in years.