In this episode, Bobby gets a black eye from getting into a fight with a kid who is bigger than him. Moments later he is shown in his room and the black eye is gone.
When Bobby is bragging that he grew an inch and a half, Cindy corrects him that it's only half an inch, and confesses she moved the mark down half an inch. She should have said it was only an inch since it was an inch and a half and she moved the mark half an inch.