[Zack shrugs, looking sheepish, but there's something else in his face. It almost looks like fear, bordering on something like terror.]

I dunno, man. Maybe cause of my cold, but....I just can't see them. Can't hear them or sense them either. There's nothing there for me to hit.

[And the implications of what that means for Lloyd sends shivers down Zack's spine. Hallucinations aren't good.]