i saw an episode where they were trying to help an old man get some proof on his psychic abilities.
They took a heat reading camera of somesort, and watched this guy while he was reading the bald guy on the show.
You could see this dudes aura flaring up, and then a tendril shoots out from the old mans aura, and enters the bald guys, and from then on it seemed like a genuine read.
Everyone knows, best way to fool someone, by acting the skeptic, because if its coming from a skeptic, then its obviously true.