Another amused noise, but the conversation cuts off with the unanticipated turn worsening Papyrus's dizziness. He stumbles and tightens his grip on Sans's shoulder, leaning more weight for balance, before managing to resume the gait his stiff and erratic limbs allow.

Once that's established, he does peer up at the building, eyes squinting more than usual to try to make sense of it. A house, sure, he can see that much - like he sees the shapes of light and shadow and color of the neighborhood. But he watched the shadows and large shapes like passing people because the finer details are escaping him, and right now there's no recognition on his face.