An entertainer friend of mine practiced magic as a kid. One day he went to Busch Gardens amusement park with his family. There he saw an organ grinder with a monkey trained to take coins from people and put them into a cup. My friend, a proud young magician back then, said with a wink to his family “Watch this!” He offered the monkey a coin, but palmed the coin—made it disappear in front of the monkey’s eyes. The monkey went berserk. It shrieked and started slapping the child-magician’s hand. It kept on screeching and looking around wildly until the poor kid, surprised and frightened by the monkey’s reaction, gave up the coin.