Sans watched in horror as his partner, his love, W.D Gaster tumbled off into the core. Sans ran to the edge and yelled for him. Gaster fell with an outstretched hand and made eye-contact with the skeleton as he descended into the deep nothingness. He yelled, though Sans couldn't hear him over the sound of his own screams.
Sans wanted to go with him! He started to jump, but was yanked back by grey hands. They prevented him from jumping in after Gaster and it frustrated him. Gaster signed something as he fell.
"FAREWELL." Gaster started to dust slowly as he looked up at his partner. "MY LOVE." Sans pressed a hand over his mouth as he began to sob, his ribs heaving as he reached out for Gaster, as if he could pull him across the void into his grip. But it was too late. A tear ran down Gaster's smiling face as he disappeared into the deep darkness. It was only about an eight second fall,
"Sans, you must get out of here. You can't mishear that, the core is going to explode!" One attendant shouted. Sans didn't try to fight the hands as they dragged him away from the core. They spoke like he wasn't here. "Get him out of here!" They rushed down the hall as the core started to grumble loudly.
"It's gonna blow!"
Everything went white. Sans could remember the look of horror on the lab assistants faces as fire consumed them. The force of the blast sent the light skeleton into a boulder as his friends burned alive. He struggled to keep his eyes open as liquid determination oozed down his skull and onto what's left of his lab-coat. He choked on the blood as he silently counted his injuries.
A few broken ribs and a crack on the top of his skull. His hands shook as he pressed them to the oozing cut. His eyesockets filled with tears as everything faded to black.