Apparently partially recovered memories aren't enough for Sans to be back to his normal, non-combative self. Which leaves him in this strange limbo between the fake Sans and the real one, where he remembers things and acts like himself... some of the time. Only some of the time. Falling back apart at the worst times.

It's enough to make a skeleton really, very concerned for his brother. How much of this anger was from the fake stuff? How much was Sans himself? Maybe there was something to Rarity's doubts. Maybe getting better would take them all a lot longer than they hoped.

Papyrus shakes his head, dismissing the worries. Either way! The important thing right now is making sure nobody gets needlessly hurt. And this erratic display of power Sans is tossing around, moving things around them without even meaning to...

Well, that kind of display has nothing on Papyrus' precise control. His natural stamina, his careful control honed by training with the captain of the Royal Guard herself...! Surely, temper or no temper, Sans won't accidentally hurt any of their friends in the apartment.

And it's up to Sans' brother to look out for him and make sure of it. The blue glow around all the items intensifies as Papyrus puts his own pressure on them, redirecting all the floating objects back down.