[Unknowingly, Papyrus shares the concern. It's part of the reason he wants to keep the chatter going, even if talking at length is going to make his face hurt even worse - to make sure they both know the other's still there. Even if this isn't some kind of Orpheus situation, and his brother can perfectly well turn around, he'd really rather Sans didn't need to. Papyrus keeps gently squeezing the granola bar between his forefingers, trying to find the balance of squashing it without crumbling, the better to fit through the mask's gap like a key in a slot.]

Human ghosts, like dead souls? Rattling chains and saying boo? [Maybe cartoons aren't quite the place to start, but it's easy to bring to mind. He's disbelieving of it, and a little indignant.] Human zombies, human ghosts... Why are all the 'monsters' here, just humans who've gone off somehow.