Sans's only option is to teleport away completely - he ends up on the roof of a nearby building, looking down as the stars shower across the courtyard and probably set some bushes on fire. He sees Greg leaving, but this time he doesn't follow.

Instead, he sits down on the ledge of the roof and pinches the bridge of his nose, wincing at the pain the crack causes him in response. He needs to chill out for a while before he goes home to explain this to the others.

"God, Greg," he mumbles to himself. "When the hell is it going to end?"