He looks awful, and Elsa's brow creases with worry. She's not used to Sans sounding... almost fragile, like this. The fact that he didn't even bother with a pun this time just adds to the alarm bells.

Whatever happened, she should have come back sooner. Even if she couldn't have prevented it (and she doubts she could, if the other supervisors together couldn't), at least she would have a better understanding of what happened, and how to help.

But there's no time for survivor's guilt right now. She has to do what she can in the aftermath.

"...Maybe we should go to my trailer and you can tell me about it." Instead of standing out in the middle of the carnival. The trailer she's claimed as hers is already back the way she likes it, that is, mostly frozen over by a few inches of ice.