Animaniacs

Baby Plucky Duck (from Tiny Toon Adventures) makes a brief cameo appearance.

Death can be seen in a level of the Animaniacs video-game on the Sega Genesis.

The sign in the beginning of the episode says: Welcome to Sweden, land of meatballs and Volvos.

In this episode, instead of the typical "Are you pondering what I'm pondering?", Brain actually says, "Are you thinking what I'm thinking?"

The sound of a gong made Brain recite "I'm a Little Teapot", and the sound of a bell ringing made Pinky do a traditional Russian dance.

Throughout the episode Dot's jacket was black. But near the end of the episode when Beethoven confronts the Warners before he says "Why you... you...!", Dot's jacket was pink.

Why would the sound of the Warners' chewing distract Beethoven? It's already been established in the episode that Beethoven has already gone nearly deaf.

After Ms. Flameel demanded Yakko to count from 1 to 100, Yakko replies "Hey, it's a six-minute cartoon." This is technically incorrect, as this cartoon is approximately eight minutes.

Look Closely: In the shot of the mob about to jump the bear-man, you can see Buster and Babs running from Dizzy Devil-- all of which are characters from Warner Bros. previous cartoon hit, Tiny Toon Adventures. You can also see Batman drawn in the style of the Batman in Batman: The Animated Series near the back of the mob.

The sign in front of Picasso's studio says Model Wanted, but Yakko says "Models Wanted."

Fermin Flaxseed sounds alot like The Narrator from "Earthworm Jim".

Yakko is apparently able to speak Japanese.

When the Warners are hiding in the music pit, they alternate playing "Turkey In The Straw" and Mozart's "A Little Night Music".

The song "Promenade" from Mussorgsky's Pictures At An Exhibition, is often heard through the episode.

The turtle who yells "Hey, watch it, dude!" speaks with a voice like Michaelangelo's, but was wearing the purple mask, which would make him Donatello.

For some reason, Michaelangelo is wearing a Roman toga, even though this takes place in Renaissance Italy.

Captain Mel can be seen as a boss in the Aquatic Stage in the Animaniacs video game on the SNES.

Yakko omits Eritrea from the African nations, as well as several Asia-Pacific countries such as Western Samoa, Nauru, etc.

Porky Pig has a cameo in this episode.

Ralph can be seen greeting the stars in the beginning of this episode. Since this is supposed to take place a while ago there is a mistake because Ralph does not look old enough to have been around.