[The more their conversation went on, the more Anakin started to wonder if Obi-Wan was even listening to him. Not that it was unusual (in his own opinion), but for some reason a feeling of concern continued to bubble up.

Something is wrong and he does not know what.

And that in itself bothers Anakin a great deal.

The question was also most odd and he had no idea why Obi-Wan would even bring it up.]

Uh ... you mean this one?

[He lifted up his metal arm in a gesture towards the Jefi Master.]

I lost it back on Geonosis. But you should remember that. Are you feeling all right, Master? Please tell me this is just your old age getting to you.

[Maybe if he made enough quips at him, Obi-Wan would stop acting so strange]