The Cascade is an obscure event in the history of the PPC, in which the young Makes-Things caused a chain reaction of plothole formation which spread throughout the Multiverse. This took place in the mid 1980s HST, and the network formed was used to rapidly expand Headquarters, and explored by Captain Dandy and the Weeds.
One factor in the creation of the Cascade was the destruction of the Flowers' homeworld of Origin.