You had walked out of the Ruins, you hadn't killed anyone, why would you? The goat lady was also pretty nice.

You walk over a stick, and some snaps it in the blink of an eye, and you walk to some sort of bridge, and someone speaks from behind you

"h u m a n, t u r n a r o u n d, s h a k e m y h a n d."

You shake their hand, and you hear a whoopee cushion go off

Sans: "ol' whoopee cushion trick, always funny."

Sans: "i'm sans, sans the skeleton."

Papyrus: “SISTER, IS THAT YOU- WAIT.. A HUMAN!!”