Sans winces as Croc goes flying backwards. As the tumult dies away, he finds himself being torn between satisfaction and just a bit of fear. Satisfaction, because...well, if that attack hurt that much, then Croc probably deserved for it to hurt. And fear because...he's not sure his attacks have ever done quite such noticeable damage before. Not even against Chara.

Well. Damn.

"probably," Sans agrees with a shaky nod, keeping his gaze fixed on his foe. One eyelight continues to glow a smoky blue. It's almost as though the castle doesn't think he's busy enough without at least one vengeful enemy on his metaphorical tail. He knows he could stay, and probably finish the job.

But he finds himself much more worried about the people in his life who aren't quite as good at dodging as he is. If this guy is as willing to go for the kill as he seems...maybe those tufts of white fur weren't an accident. Maybe it's better to leave him wounded than to let him come back fresh in three days.

"gotta catch me first, though." He winks. And then he fires again. And then, when the smoke from the blast clears, Sans is gone.