The Party.

This doesn't refer to an adventuring party. This was a situation that developed during a placeholder session where half of the players couldn't make the session and the other half wanted to play. Dungeon Master Eddie talks to one of his players from that campaign, Jeff, who was there for a throwaway session where the two players were dealing with a throwaway minor antagonist and created a scenario that changed the campaign that ran from levels 1 to 20 in a way that changed the paradigm, flummoxed the rest of the party forced to deal with the consequences, and created a story that granted DM Eddie the title of Dungeon Master Emeritus.