Taking another bite of his apple, Piper listened to the humming. He chewed quietly, shifting his gaze from the clouds to the source of the sound. He watched the woman for a few moments, swallowing his bite. He pushed himself up and said, "Excuse me, but what are you humming?" It didn't sound familiar in the least, but he did like how it sounded none the less, and he was curious. Maybe if it wasn't a made up tune he'd be able to learn it and add it to his act. He did like singing, after all, and it paid to keep things new and interesting, after all. And if it was made up? Maybe she would do him the honour of teaching it to him. Either way, he was curious to know more about it.