by sleightlycrazy » Nov 5th, '11, 19:32
Well, usually the exposure you're talking about doesn't actually expose the real method, so you can still fool people by using the true secret (the extra ball). I'm still working on it myself, but I preface the exposure by saying, "I'm going to tell you how it's done, but even after you know, it'll still fool you." Basically any time people's attention is focused on an area of the table, you can use that as misdirection for the final loads. I suspect that if you analyze Penn and Teller's cups and balls, you can find way to get the final loads without exposing the false transfer or palm.
Currently Reading "House of Mystery" (Abbott, Teller), Tarbell, Everything I can on busking