Sans: Oh hey Kiddo how y-

stops when he sees this smile

Teleports to Frisk and Asriel.

Sans: Guys, Chara killed someone.

Frisk: Sans that's rude.

Asriel: Yeah you don't know that.

Sans: Take a look.

Both look out the window to see Chara:

Asriel & Frisk: Damn, they kill someone.