You spent hours with Mettaton, talking about various things, from the surface and basic human behaviors to how things in the Underground worked. He was very curious about humans, apparently not many humans fall down here, let alone live long enough for him to meet them. He was animated as he talked about his dreams of being on the surface and how SOULs worked and he stared at you with attentiveness as you spoke about what it was like on the surface. Time truly flew by, but deep inside you knew you had to keep going, you had to go home.