One more "Animaniacs" cartoon I wanted to draw attention to is a Chicken Boo cartoon, "The Good, the Boo and the Ugly." Chicken Boo was the weirdest concept on "Animaniacs" and one of the funniest once you caught on to it. Every cartoon was the same: Boo, a giant chicken with no anthromorphic qualities (he looks like a chicken, acts like a chicken, can't talk), manages to fool nearly everyone into thinking he's a respected authority figure merely by putting on a fake mustache or a hat or something. Yet when he loses his disguise and is exposed as a chicken, everyone turns on him.
The cartoons were basically meta-cartoons satirizing a bunch of cartoon tropes: the fact that cartoon animals can interact with humans (Mickey Mouse is a giant mouse, after all, except he's a cartoony mouse whereas Boo is a non-cartoony chicken), the convention that no one can see through a cartoon character's disguise, and the repetitiveness of cartoon plots. "The Good, the Boo and the Ugly" is probably the best of the Boo cartoons; it's preceded by a Good Idea/Bad Idea segment.