A familiar skeleton flashes back to a certain moment in his life. Sans remembers himself at Grillby's by himself. Something's really getting him down, and he doesn't eat that much. He leaves, with a wave from the bartender, the ambient crackles of his flame ringing in his ear. It's really late out, and Sans walks on an empty road back to his place, surrounded by that endless array of trees that he'd seen so many times before. The resets coupled with a bout of depression had made him a bit more down than usual. If he could frown, he would.
Sans moped home to see a face that had always made him happy, Papyrus'.
"Hey, bro," Sans said as he slowly walked up to his room, avoiding eye contact with Papyrus, "What are you doing up so late?"
"Well, I was practicing my new technique, and I was coming in just in time to see you here!"
"That's really cool, Papyrus, but you need just as much rest as I do. C'mon, let's go to bed," Sans started wandering up to his room.
Just as Papyrus was about to open his door, he stopped him from going to his room. "Wait a second! You forgot about my bedtime story... and you seem to be a bit more cranky than usual. Something must be wrong, and I, the great Papyrus, shall find out what that thing is!"
"You don't need to worry about me, bro. Now let's tuck you in all snug and stuff..."
"Sans, there is only one thing left for me to do," Sans finally looked at his skeletal brother, and awaited what he was going to do.
Papyrus finally gave a response, "Papyrus hug!" Papyrus squeezed him like he did every time, but it was somehow comforting.
"Thanks, bro. That was just what I needed," He meant that, too. That was what he needed to get through to the next day. Papyrus' face lit up with joy.
"C'mon, bro. Let's get you to bed," Sans said. Sans then flashes back to reality. He's standing in the final corridor, with Chara- er, Frisk right in front of him. "Welp, I'm going to Grillby's. Papyrus, do you want anything?"
Sans limps out of Frisk's sight, with a giant ketchup wound in his shirt. Yeah, ketchup. Sans finds that a bit funny. He walks back through the underground, struggling to keep his vitality about him with each passing step. He was DETERMINED. There was one place that he really wanted to see one last time.
There it is, still standing in Snowdin, Grillby's. It's been practically abandoned at this point, all of the buildings had been for a long time, but it still looked familiar. Sans walked in, and there was still one light on in the building. It was blinking, so he couldn't see that much. The place was cold and empty, like Frisk had hollowed out the entire place once everyone evacuated. He sat down at the bar, and just reminisced for as long as he could muster.
Then he remembered that he had a giant cut in his chest.
"Oh, wow," He then saw that more ketchup had spilled all over him.
"Oh, wow,"
He then remembered that these were his final moments. Sans could feel his legs turning into dust already. With his final breath, he mustered 2 more words.
"Oh... wow,"