Annabeth was trying hard to do that Laughter Yoga unsuccessfully. She had trouble keeping her balance and, at the same time, was distracted by the sparkling lake. What can this have to do with the DADA lessons? But remaining wordless wouldn't be a good idea, the teacher hadn't noticed her presence until then. She raised her hand and almost fell. Sure! Everyone was talking without leaving the yoga position, she should do the same. "Professor, I was reading about boggarts in some books and I imagine a boggart as a cloud of nano-elements which is activated in order to combine themselves taking a form when it noticed someone's feelings." I hope it hadn't been a big mistake to say it aloud. People could laugh at her for her sharing her delirious theory.