Okay. Okay, that doesn't sound like somebody who's about to attack them, and that's enough to make them relax a little.

"...you were scared."

He is scared, though they're not completely sure why. They don't know how to read him yet--with Sans, he'd already been mysterious, so they were never taken off guard when he acted different since they didn't entirely know what normal was. With S4-Papyrus, they might get it wrong from their own expectations.

Still, they can try taking a guess. "'M not mad. I'll...be alright."