Mozart's Compositional Genie

Mozart wrote a quintet with one of the characters' mouth's padlocked shut. And so Mozart has actually written out this character trying to sing while his mouth is padlocked shut up. So all he's able to do is really hum, but he's still written out. It's like he's kind of poking fun at the operatic genre that he can write a quintet in such a way. He's that great of a composer in a way.