Ah, well... Undyne chased you all around Waterfall. I think I helped you over the phone...? And then... Undyne disappeared. After fighting you. And, and Mettaton, and Asgore.

[His voice goes a little quieter, a little more solemn. It's hard to talk about, but Sans wants to talk about it even less. Especially now, that he remembers even more worse things. And... how could he bring it up with Doctor Alphys? They aren't close friends, and she disappeared too. He certainly doesn't want to hint to her that she might have died, when he came from.]

Which, I'm sure was self defense! I know what she meant to do. What they all... said they were going to do.

[Maybe it was just part of the show with Mettaton, but maybe not. Undyne, and Asgore... there was no question with them, their intentions. Papyrus stares fixedly ahead, walking carefully through the damp tunnel past the back side of decorations. Places like this, where there's a clear path and decorations meant to surprise and frighten and entertain the guests to the carnival, they're really rather homey. It's one of the bright points of being in the janitorial staff, having the responsibility to go all over like this. And the only people whose morale he's supposed to be responsible for are himself, and maybe Sans... which is a lot easier than reassuring the whole underground.]

And, you disappeared too. But you picked up the phone! So I'm sure you left alive, as you meant to.