Ned makes reference to Maude as the "sweet woman of my own lying in the twin bed across the hall from mine." However, it was well-documented in the series that Ned and Maude shared a bed. This includes the episode where Maude died, where Ned wakes Homer to talk after missing Maude in the bed next to him.
When Edna first gets on the ladder, the top half comes away from the wall, when she returns, the top half is attached to the wall and the bottom half isn't.
Superintendent Chalmers called Ms. Krabappel Mrs. Simpson.
No he didn't, he was talking to Marge.
No he didn't, he was talking to Marge.