When it comes to using a single gaff card, to be part of a deck-I have the option of slipping it in or out as I perform-or, set aside an entire deck, to accommodate the gaff and the effect it produces. Telepathic Joker is a very clever, humorous effect. I try to vary my effects with as much novelty as possible. Surprises that people just would not have imagined (because they don't spend enough time with magicians). Because of the placement of the joker, I gave this trick it's own deck. It's not a huge miracle, but it enhances and adds humor to the coincidence principal. I'm pretty picky about single card gaffs-and the effect has to be strong, for me to take a card in and out of a deck. It becomes a technical consideration, because gaffs-gaff decks involve switchouts, palmouts, or palm-ins. I might use 4 or five such effects, and they all are cards with special printing, like the Telepathic Joker. While I can recommend this trick-because of it's cleverness, surprise, and humor-I also recommend finding a way to do the same effect, minus a gaff. Adapting gaff based effects, including packet tricks, to a normal deck saves much time...and there's no need to worry about switchouts, palms...or the occasionally odd moment when you may have forgotten to remove a gaff-or forgot it was there-and a spectator sees it.