Well, it's enough to break his stoic demeanor a little bit and have him give Betes a look of surprise. You looked more than half dead, but.... to actually be a ghost - that's impossible, right? Mind you, the idea of being in a separate world should also be impossible.

Hmmm. Needless to say, his mind is racing on the situation right now. What they really need is proof. "We need some kind of proof."