Bart's Nightmare was the Butterfinger commercial that originally aired on 2001.
Bart is in the candy aisle at the Kwik-E-Mart but can't find a Butterfinger and asking Apu where they are. Apu tell him it's sold out but he can try his other 350 candy varieties. Bart starts to panic and saying that he needs the crispity, crunchity peanut-buttery Butterfinger. Nelson then tells Bart at he can give him four fingers and just when he going to punch Bart, he instantly wakes up and sits in bed and starts to eat a Butterfinger, saying: "Nothin' like a Butterfinger!".