Man, wouldn't it be funny if Gar took back some souvieners from his dealings with the supernatural and placed them in the Mystery Shack.
"This is the Amulet of Aaracknah - an old deity of the forest. It is believed to be worn by the Tribal Leaders to act as their connection to their protector! Legends say that if you wear it, you would hear the whispers of the mad deity of the forest. Pictures cost a dollar each."
And these all turns out to be true but of course, people are just in it for the kicks of a hoax.