The Warners go through several studio attractions all of which are on the Universal Studios tour, not Warner Brothers studio.
Aside from being a parody of Apocalypse Now (1979), the story in this cartoon is also a send up of the production of that film which was plagued with many problems.
The Director says he ate a bug, which is a reference to a cut scene where Marlon Brando says he swallowed an insect while acting as Kurtz. The scene is shown in the documentary Hearts of Darkness: A Filmmaker's Apocalypse (1991).