"It's a language that uses your hands," Magnus explains, directing his words to Sunny but flicking regular glances up to Lancelot, too. "A lot of people here know it. So, for example--" He holds his hands flat in front of his face, palms down, fingers angled toward his chin, and then pulls his hands up and back like he's tossing something over his head. "That means 'overwhelmed.' That something is too much. It lets people know you need a break. Can I see you try? Both of you."