What is the most misunderstood musical instrument?

Yesterday I had a minor disagreement with a non-musician who insisted that all you had to do was blow into a trumpet to produce a note. After considering this erroneous assumption I considered many of the other musical instrument errors I have observed over the years. Movies are loaded with them. Even trained musicians with college degrees have misconceptions. I don't think the trumpet qualifies as the most misunderstood instrument, it is the tip of the iceberg. Stereotypes, misconceptions, etc,.