you were walking around the city of a random au you decided you visit. Walking around, you were about to turn the corner but stop and notice 3 skeletons there

two of them you recognize as killer and dust from the bad sanses, a well known group of bad sans aus across the underverse. Killer had the third sans, slash, pinned to the ground, while dust was holding a knife standing next to them

killer: "what do you say? right arm, or left?"

Slash: "f-fuck you..."

Dust: "tch...right arm then."