Alone Again Natura-Diddly - S11-E14
Continuity mistake: In the episode where Maude dies, Homer puts Ned to bed in the right hand side. When Ned tells Rachel he's ready to smooth out Maude's shape, they smooth out the right hand side.
Alone Again Natura-Diddly - S11-E14
Continuity mistake: Homer's watch disappears when he is getting his car fixed.
Alone Again Natura-Diddly - S11-E14
Continuity mistake: When Homer is filming Ned cutting the bushes between the two front yards, the camera Homer is holding suddenly switches eyes.
Answer: Willy referred to an encounter he believed he had with actual aliens, while Wiggum thought he was referring to the arcade game.