It caught me odd that he didn't even joke or quip at how one of the men on the team was so paranoid about a Resonance Cascade, which it is inferred that Freeman knows what it is.
I agree that it would have been pretty funny for him to say something about how was scientist had been really worried about a Resonate's Cascade and that he was paranoid to think that something so absurd could happen but Ross would probably see that as breaking the fourth wall or something.
Though I personally think the amnesia is already starting to get old, having been in the past two episodes. I don't really like how slow and gradual Freeman is remembering what happened. Usually when people get amnesia something they do or see will remind them of what they forgot and trigger an instant recall of all of it. That would be better just because it could give Freeman a chance to react more strongly to something which I haven't really seen in the past two episodes.