The confusion actually becomes a bit more visible, the seeming to have faded.

"Hmm? Yes, I'm fine... Why wouldn't I be?"

There's another pause, though this one's more conscious. He's more clearly thinking during it, and he looks off to the side as it clicks.

He said or did something odd or contradictory, of course. He should have realized it sooner.

"Ah. Apologies, I must sound rather strange in comparison to what you're used to."