You were in the last corridor, right where the last battle in genocides usually takes place in. However, in front of you there wasn't Sans as usually. No...there was his brother...Papyrus. As he sees you, he sighs and says

HUMAN, ALLOW ME TO TELL YOU ABOUT VERY COMPLEX FEELINGS. FEELINGS LIKE...LOSING SOMEONE YOU LOVE. LOSING EVERYONE YOU LOVE. BEING ALONE AND SCARED. STANDING IN FRONT OF SOMEONE WHO WANTS TO HURT YOU. THESE FEELINGS...THEY MUST BE WHAT YOU'RE FEELING RIGHT NOW.