Caretakers wearing masks appear and restrain him after he has hummed a strange melody. The child had hummed a simple melody of which Liszt made the song. The song was created from a melody hummed by Mars and Lawrence. She purposefully hummed along with the tracks he played for her, to get his attention. He composed the sound, assembled the musicians and hummed the tune to them for recording. I hummed this tune to him for which he wrote lyrics. Gilbert hummed a few lines from a sea shanty, and Sullivan knew what to do. Bryan Ferry added hummed backing vocals to the song. War-based industries hummed with the labor of a greatly enlarged workforce.