Angry Dad Episode 3 involves Angry Dad sitting at his desk, bragging how easy his job is. Then he presses a button for no reason which blows up the Nuclear Power Plant except for his office and his boss' office, and screams "NOT AGAIN!!!", as if this happened before. Then Mr. Burns (voiced by Bart Simpson) walks in and fires Angry Dad, causing his head to explode in a similar manner to how the power plant exploded.
This was ultimately the only episode where someone other than Dan Castellaneta voices a character in the series, as Bart Simpson (the creator of the cartoon) voiced Mr. Burns during his brief appearance.