Originally a marketed effect, this hard-to-find Bob Mason gem is a real baffler! Spectator shuffles a deck and takes a handful of cards, magician never knows how many. Spectator looks over his cards and JUST THINKS OF ONE, and shuffles his packet. He returns the cards to the deck. The magician, during the course of showing the spectator cards one by one, KNOWS INSTANTLY WHEN SPECTATOR IS LOOKING AT HIS MENTALLY SELECTED CARD!!! This is a sure-fire puzzler. NO SLEIGHTS—NO MATH FORMULAS—NO PREPARATION—USE A BORROWED DECK—YOU NEVER LOOK AT A SINGLE CARD!!! Presented as a "test" of a spectator's ESP abilities, Mason's "Just Think" first engages and then, badly fools your audience! 7 pages, re-typeset.