There's a low, short 'ohh' as she explains, a previous discussion clicking with the mention of dreams. Inigo had talked about that, briefly - very briefly, when the discussion veered too close to a bitter reminder for their mutual pal.

"Huh." His brow dips together. "You mean...the thing that hit the train was that? You sure?"

This was the first he was ever hearing a connection between the world eating thing and...anything else before that one botched mission, actually.