For a moment, Carlisle sees recognition creeping into Firo's eyes, and he's relieved; said relief vanishes one second later as he's accused of spying on the poor fellow.

"What!?" His disbelief is so strong that he winces from the outburst, as his arm is still very sore. He leans into the wall again, trying to hold himself up as he parses out this madness. "No! Why would I even do that?"

He shakes his head, taking in a deep breath. He has amends to make to this man, and his lapse in sanity is not helping. "Okay, stop. Start over. You have no idea who I am. You really don't know?"