"I went for a swim," he says dryly. Back to the topic at hand:

"There's something about this place, someone or something here makes illusions based on our worst experiences and fears. Think, where were you before this?" The door he came through is still open; that's not a standard office hallway on the other side.

"Come on. Just play along for a moment, and I'll show you." He gestures toward the door with a beckoning motion.