[Chewbacca is fixing C-3PO]
C-3PO: Oh, yes, that's very good, I like that... Oh!
[the lights in his eyes go out]
C-3PO: Well, now, something's not right, because now I can't see!
[Chewie fiddles with something and his eyes turn back on]
C-3PO: Oh, oh, that's much better. Wait... wait. Oh, my! What have you done? I'm BACKWARDS. You flea-bitten furball! Only an overgrown mop-head like you would be stupid enough to...
[Chewie switches 3PO off]