Sans: Never gonna give you up!
Frisk: //reaching for him frantically as Chara pulls them into a corrupted genocide save file, forsaken when Sans turns away//
Sans: Never gonna let you down!
Gaster: NOOOOOOoooooooo
//falls into the void when Sans let go//Sans: Never gonna run around and, DESERT YOU!! //runs away//
Toriel: But you said you would go clothes grocery shopping with me ;-;
Alternative (original idea):
Sans: Never gonna give you! Never gonna let you down! Never gonna run around and dessert you!
Papyrus: //glaring, has pie covering half of face// You fucking cunt bag. I hope you die horribly.