There we go. Some of the tension in the room dissipates. Asriel seems to distance himself from the knife, turns his focus on Papyrus. Asks if he can help make spaghetti. Good. Sans would much prefer this day not take a sharp turn into catastrophic, like far too many days in the past few weeks have done.

He relaxes infinitesimally, grin twitching wider as Asriel mouths thank you to him. He pretends not to notice Papyrus's glance. You'd have to be denser than lead not to notice the sense of unease, but at least it's passed.

Moving on.

"wow. that was a good one, paps. i'm impressed."

It's always such a delight when Papyrus makes puns. And indication that he's in the best of moods. Plus Papyrus is actually good at puns when he stops hating them for a few seconds.

"but i think i'll just watch. i'd just get in the way, and you already have one student." He openly winks at Asriel. "best i can do is provide humerus running commentary."