The Great Rubber Boom, also often referred to as "The Great Rubber Boom of the Southern Continent, early 1900s", is a recurring subject in the series Kiff.
The Great Rubber Boom was a major event in the history of Table Town. In the present day, it is taught in the city's schools and has inspired books, games, and food products, among other things. Though the event is frequently mentioned in passing throughout the series, its exact nature has never been explained.
The event appears to draw inspiration from the real-life Amazon rubber boom, an economic boom in the continent of South America brought about by the extraction and commercialization of rubber in the Amazon basin between 1879 and 1912. In Kiff, various items referencing the Great Rubber Boom feature images of tapped rubber trees.
Harry's teacher is seen giving a lecture on "The Great Rubber Boom of the Southern Continent, early 1900s". At the end of the episode, he asks: "What does this mean for the rest of the continent?"
One of Kiff and Barry's tasks is cleaning up a billboard which has been vandalized with the phrase "The Great Rubber Boom was faked!". Kiff simply changes the word "was" to "wasn't".
At Roy's garage sale, Barry finds a pack of trading cards depicting "moments from the Great Rubber Boom of the Southern Continent (early 1900s)".
An issue of Rubber Boom Comics is among the items in Kiff's collectorium.
The old Table Times newspaper that Kiff and Barry read at the Table Town Public Library features the headline "The Great Rubber Boom Rages On!", along with a picture of a tapped rubber tree.
In the sewer where Nice Guy is trapped, a graffiti message is partially seen, with only the letters "az" visible. The full message, as seen in the uncropped version of the scene's background, is "The Rubba Boomaz Wuz Here".
A cereal box in Trevor's pantry features the text "Moments from the Great Rubber Boom of the Southern Continent (early 1900's)" and a picture of a tapped rubber tree.