During the episode where Mr. Feeney and Corey change places in the classroom, Corey becoming the teacher and Mr. Feeney a student, Corey rights what he wants to be called, Hey Dude, on the chalk board and underlines it. A little while later a view is shown of Corey talking to Minkis with the board and name in the backround. The camera man then cuts to a closer view of the two kids. A few seconds later the view is changed back to showing both the kids and the writing on board but Hey Dude isn't underlined anymore. A change of few happens again going closer to the two kids. When the view is finally changed again to the orignal view with chalkboard the line underneath Hey Dude magically has reappeared.