Not a bad episode, but those voices in the opening.. What the hell? Where did they come from, and why did somebody decide that adding Bart's laughter, Maude Flanders (wtf?!) saying "oh my" and Chief Wiggum saying "hey" to the opening would improve it, after, what, 18 years? They really detract from it.
The entire crumping scene was pretty painful, too.
I have to say, it was clever that they showed right from the beginning that Milhouse's parents were still alive. It made for less suspense, but it allowed the rest of the story to be funnier.