Frisk studies his movements intently, copying them again, as well as saying "Adeket soundproofing" softly to themselves. "It's a castle, it's just made of rock and stuff I think. I dunno. I scared people when I hit the...that." They point to the shadowy back of the music room, where an organ so massive that it makes itself seem like part of the wall there. "Maybe somebody can make something that can block noises."

They never did get the story of why they hadn't really heard of Gaster underground.

"Well...there's some Sanses here. One told me 'bout you a little bit, you were his big brother." Unconsciously, Frisk draws up to be taller--not very helpful, they're tiny--and stops signing, balling their hands into fists in front of their chest. Their voice and expression are as calm as ever. "Then there's a Sans and Papyrus that're really young, and they came from a Gaster's lab."