Papyrus nods, guessing what she means - that fog. He's heard a bit about how it impacted the city, saw some of the Witches at the hospital suddenly sprouting their own monstrous features.

"Just like that? Recently??"

Very casually, he leans to the side a little, glancing back the way Chandra came from as if there's a pair of horns lying in the street. There aren't, and it was a kind of silly thought. But there's another logical extension from what he said to what she did.

"Did they itch, coming in? Or... hurt falling off?"