3. Houdini’s Secret Code
The Great Houdini was known for his great escapes from impossible situations. However, he was also known for revealing fraud among people trying to come off with magical powers. Apparently, he had devised a secret code to his wife with which he could communicate with her after death. A friend of Houdini tried to use this secret and tell people Houdini was contacting them after death. However, this was soon to be proved another fraud as Houdini never showed up when summoned after death.