A Latvian finds a magic lamp. He rubs the lamp and a genie comes out, saying “I will grant you three wishes.” The Latvian is overjoyed. In a rush, he says “I want potato!” “Your wish is granted!” says the genie, and the Latvian finds himself holding a potato. “What is your next wish?” says the genie. “I wish you go away, so I could enjoy the potato.” So the genie leaves.
Also, that was the only magic lamp that the Latvian ever found.