Community: 15 Best End Credits Tags Ever
10. Takashi's Yakuza Origin Story
Episode: "Basic Crisis Room Decorum" (Season 6, Episode 3)
This episode features the hilarious subplot where Jeff (Joel McHale) gives Dean Pelton (Jim Rash) a fake phone number, resulting in him having an extended text exchange with Takashi, a Japanese teenager living in Tokyo.
The episode ends with Takashi being reamed out by his father for his international phone charges, after which he texts the Dean, who is sleeping at the time, asking for advice.
However, a dejected Takashi is unable to convince the Dean that he isn't Jeff, at which point a voiceover of an older Takashi interjects, revealing that this seemingly insignificant event set him on his path to become the Oyabun, the leader of the Yakuza.
Season six had a number of brilliantly off-the-wall end tags, but none that fed quite so seamlessly from the rest of the episode.