This might be an opportunity to reassure the others... or it would be, if Rita could bring herself to do so. Instead, she lowers her hands away from her face and gives Sans a long stare through the visor, then scoffs and looks away.

The UI follows her gaze, and to distract herself from the dull pain and the fact that she'll soon be seeing the same thing happen to someone else, she looks over what UI elements she can see, though it doesn't seem like she can interact with much until the sync completes... which is vaguely ominous in itself.