In Flynny's building complex, they've got themselves an old "blind twitcher" - aka a neighbour that seems to keep their eye on everyone else in the hood, and is quick to rat out any wrongdoings to the body corporate.
How does Flynny know that he's got a blind twitcher?
Well there's a great joy in pointing out the irony of Flynny noticing his nosy neighbour keeping an eye on him!