Magic tree prank

"The Magic Tree prank is one of the most incredible pranks to pull on unsuspecting victims! It requires nothing more than a paper tree, some tape, and a few determined pranksters. The prank begins by taping the paper tree somewhere for people to notice it. As unsuspecting passersby take note of the tree, an operator secretly plants coins behind its trunk. When somebody drops in a coin expecting the "magic" money tree to bear fruit, those behind the prank activate an ingenious mechanism revealing the person who just dropped a coin as the real fool! The lack of results but sudden reveal of those pulling off this creative gag makes it such an entertaining and clever ruse."