The four panda children are turned to stone, like the Constellations before them - and also like Medusa, namesake of the Ancient Greek myth.
When Zhizhu yells "Egg Saaaack!" - it's inspired by the sound Oprah makes when she does audience-wide giveaways.
When the children fall from top of screen to bottom, then magically appear at the top of the screen again - this surrealistic comedy is inspired by classic Looney Tunes cartoons (for example, Daffy Duck in "Duck Amuck").
The long stick-weapon that Ping uses while riding cart is called a "bo staff."
"SKADOOSH" is a callback to Po's battle with Tai Lung in the first Kung Fu Panda movie; Po utters the word "skadoosh" at the same time he unleashes the Wuxi Finger Hold, a mystical move which transports the victim to the Spirit Realm.