When Will and Karen are litigating her speeding ticket in Traffic Court, the Judge begins to eat a sandwich (followed by a pudding cup), and tucks a green napkin in the top of his robe. For the next several minutes, every time the camera moves from the Judge to Karen, or to Will, or to Vince, the napkin appears and disappears.
At the end of the episode Karen is driving by herself and says that will had not taught her how to brake. This is not true as she had braked when pulled over by Vince earlier in the episode.