Rey actually talking in the room as opposed to in their heads, just a memory, was enough to startle him out of his own attempt at calming himself down. He glanced up with a wide eyed sort of expression and then tilted his mouth into a half smile.
"Yeah. It's just... a lot?" Which was really the only way to describe it. It wasn't really the memory in general that had him feeling overwhelmed so much as the emotions that had gone with it -- he supposed he understood why she'd felt them all, though.