The road trip xylophone music is a riff on Hans Zimmer's score for True Romance. Zimmer is the score producer for this show.
The final black and white scene of the Simpsons dancing in a circle is a reference to Fellini's 8 ½.
The most contradictory episode in the whole show. In Mother Simpson, Homer thought his Mom was dead, even at adulthood. According to this episode, he knew all along.
The scene where Bart skateboards naked in The Simpsons Movie is shown while Bart is flipping channels.