This thread kinda went two ways. With regards to the exposure of the French Drop, everyone's grandfather shows this to their grandkids, every actor on TV does this badly when they need to do a vanish, so I don't think it hurt anyone. Even if someone never saw that, if a coin is made to vanish the spectator will assume it is in the other hand unless you know how to negate that by your followup action.
As for being embarrassed to not fool Penn and Teller, I was on season 5, and presented my Twilight Zone Wild Coin routine. Going in I was told by both the producers and Mike Close that my goal wasn't to fool them, it was to put on a good show. The producers had selected my routine, rejecting the ones I sent that I thought had a better chance of fooling them, because they cared more about the story. So going in I knew that although they may not have known every move, they would understand the gist of the routine. All they had to say was that it was sleight of hand and they "win". As such I changed the ending, hoping that at least the technique I used would fool them, and I asked them about it in a way that I had hoped would not be confrontational ( I had discussed this with Mike Close prior to the performance). But they got it. Their answer actually made me smile. Before the spot they waved to me when I came put on stage, and after the spot they met me in the hallway and complimented my act. Everyone treated me very well, and I had a blast filming the intro with the guys who put it together. I don't think any performer is upset when they are busted, because they understand what the real purpose of the show is for. Everyone on the show gets to use it in their pubblicity. Sure, it's great to say you fooled them, but pretty great just to be on the show. Thanks again to all the people who work so hard to put that show together!