I came here. I killed your brother, your best friend. I killed one of the only people who loved you. You did nothing while I was killing your brother you just sat there. You could have saved him. You could have saved your best friend, your only brother. But you didn't, you let him die. Now it's your turn, Sans. Sans was bloody injured and on the ground and he screamed in the dream and he screamed in reality.

Sans jerked awake, his heart was racing, his breathing fast. Papyrus ran into the room.
"S-Sans..... Are you ok please say something." Papyrus said, shaking Sans but he stayed silent with tears in his eyes.
"SANS PLEASE! What happened? Please just say something." Papyrus said his eyes tearing up.
"P-Papyrus." Sans said. Sans wraped his arms around Papyrus and started to sob.
"Don't worry Sans..... I'm right here. What happened though?"
"I-it was just a stupid dream."
Sans said still hugging Papyrus.
"What kind of dream." Papyrus asked.
"Nightmare and all that crap."
"What happened in the dream?"
"H-he came and killed you. I wanted to do something.... But it was like I was ..... Paralized I couldn't move no matter how hard I tried I just couldn't. Then he killed me and that's when it ended. I don't want to relive what happened with Frisk. I couldn't do it if it happened again. I wouldn't make it. I would and up dying." Sans said a tear rolled down his cheek and Papyrus hugged Sans.
"Don't worry it will never happen again I won't allow it. I won't stand for it." Papyrus said. "I won't let it happen again."
"Thank God." Sans said.

~I'm sorry if I gave you the feels this was also based off a comic and a comic voice over it was really good it's called Night Terrors and the video is by RockerMan503~