With most shows flashback episodes, you get one character stating something like, 'I can't believe how many times we've pretended to be someone else,' and that will trigger a montage of scenes from previous episodes of when the characters have used false identities.
Now while this is a good reminder of past laughs, Community takes the flashback concept to a whole new level; not just by having hilariously random flashback scenes; but entirely original scenes too! That' right folks, all the flashback scenes in this episode are COMPLETELYoriginal and never-before-seen. Some scenes, like the ghost town or Pierce stealing Abed's food, are'flahsbacks' from'unseen' adventures the study group had, whil others, such as when Abed is talking abouthow Britta and Jeff hook up all the time, are 'unseen' scenes from episodes such as Epidemic and Abed's Uncontrollable Christmas.
Chang wasjust awesome in this episode as well, searching through the vent system after greasing himself up with butter and assuring the group he know's 'these vents like the back of my Chang.'
All in all, this episode proves just how original Community can be, and it never ceases to make me laugh.