Hey
StenleyMagic142713 the guys aren't trying to be unhelpful there's just a few things going on.
1. The initial question is a bit bizarre. The trick is unique and the description provided isn't all that specific. There's not a lot for us to go on. It might look like he just goes up to someone and says, "Hey, you are wearing pink polka dotted undies!" but I can guarantee that is not what is happening.
2. Having someone name the color of my underwear seems a little creepy and awkward. I think the responses from the forum members are trying to communicate that doing this kind of a trick isn't the best idea in the world. It has the potential to come off as creepy.
3. Posting about an accomplished magician and asking how his tricks are done is basically asking for exposure. If it's not, it getting close.
To answer your initial question. I believe that the presentation you saw was original to that magician. I consider myself to be fairly well read and I have never heard of an effect like this. So, no, I don't think this is published anywhere.
