Multiplication table on the blackboard changes between shots when Yakko sings "It's fun and it's easy..."
In "This Pun for Hire", Hello Nurse said she claimed the statue in the name of Gulf+Western, which led Yakko to conclude she worked for Paramount. However, by the time of the episode first airing, the studio had been owned by Viacom since March 1994. Viacom was also the owners of Nickelodeon, a network that later reran "Animaniacs".