The episode is structured around the study group assembling their final anthropology project—a diorama of them making a previous diorama. When discovers a stash of items stolen by Annie's Boobs (Troy's pet monkey), it triggers a flood of memories.
A sequence suggesting the group was briefly institutionalized. [S2E21] Paradigms of Human Memory
The episode culminates in a meta-parody of Jeff’s typical inspirational speeches, which is edited together from fragments of various "unseen" speeches he gave throughout the year. Production Facts "Community" Paradigms of Human Memory (TV Episode 2011) The episode is structured around the study group