After a long day of training in the force on Dagobah, Luke came back to Yoda’s tiny hut and noticed that he looked worried.
Yoda went on to tell Luke that while he was away a stormtrooper from Switzerland came by and demanded to know where Princess Leia was.
Luke looked around scared and asked, “Well, what happened?”
Yoda answered, “Hrrmmm. Used on him the Jedi mind trick I did. Made him forget about Leia I did.”
Luke relaxed and said, “Okay, that’s good, but how did you know he was from Switzerland?”
Yoda replied, “Asked him later I did about Leia to test him. Over and over he said, “Yoda, Leia who?” Yoda, Leia who?”