Re: private
[He cocks his head, mouth pursing.] Spike's worried this is leading up to something worse too. Which I guess it could do if what we're seeing here is a virtual manifestation of something attacking the real dome. Like the giant squid thing a while back - though goodness knows what the actual attack was then, and goodness knows now, too!
[And yes, the vulnerability of not knowing - of not even being able to see what the real problem is - is making him antsy. He doesn't deal well with being helpless.]