Cliff's good at looking (and, often, feeling) confused, though when the fellow looks shaken and downright disoriented, he sets down the trencher of food he'd availed himself of at the nearest table, and points at the nearest chair at it.

"You probably ought to sit down, you don't really look so good. Do you want a drink? I can get you one."

Having endured the researchers himself, Cliff can kind of infer what might be going on. His first instinct isn't to assume the guy is crazy; he seems too polite for that.

"I don't suppose you volunteered for research, did you?" Though when he asks that, it's a sympathetic smile that spreads across Cliff's face. Been there, done that, did not enjoy. So he feels for you, friend.