Bart's Nightmare was a 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 asks 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 a crispity, crunchity peanut-buttery Butterfinger. Nelson then tells Bart that he’ll give him four fingers and just when he was going to punch Bart, he instantly wakes up and sits in bed and starts to eat a Butterfinger.