Arthur's face goes through faint puzzlement as he tries to place the voice, then realisation, and then... it grows guarded. Much of that debacle is a blur in his memory, and trying to recall a tidy through line of A to B to C is like trying to pick light scatter out of a whirlpool; but individual details stand out and one of them is Wayne.

Arthur definitely did a lot of yelling that morning, and he wouldn't be surprised if some of it was at Wayne. Which is objectively a dick move, though one that's hard to separate emotionally from the fact that this is Crichton's friend, who showed up to help Crichton. Who is probably on Crichton's side in this conflict over what he did in Arthur's memories, if Crichton's still in the habit of sharing details of their relationship with anyone who asks. (This is unfair. It wasn't anyone who asked. It was only enough to feel like a public spectacle by Arthur's locked-down no-visitors standards of privacy.)

It flashes through his mind that Wayne's here to confront him, but he decides not to assume that. Arthur is at least trying not to be the main character.

In the end, the sheer nervousness of Wayne's response is both annoying and... chiding, in a way.

"Oh," says Arthur, a little closed-off, a little wary, a little guilty. "Right. I..." Oh god, he's being helpful. "Right. Er-- this one, you mean?"