[There's a breath, but absolutely no awkward pause before he says, indifferent and careless:] Not a clue.

[He lies. Oh, how he lies. Better make it convincing, though.] Well, four knocks might refer to a spot of trouble I ran into a few years ago now, but that was all taken care of before I even met you. I dunno why it'd come up again now... where'd you hear something like that from?