I love it when a show that has a formulaic way of doing things veers off. Usually we are treated to half an hour of Jeff being cool, learning a lesson, everyone hugs, Abed & Troy do the comedy thing etc. It works but it gets old. That's why the "Batman Abed" episode was a hit and that's why I really liked this one.
Yes, I know it's a cheap spoof of Apollo, but it was so well thought out in details I just laughed my head off, right from Abed looking up when the winnebago disappeared to Chase's maniac routine and Chang's auxiliary rerouting.
And yes, the anus flag thing was cheap, as were all the dean jokes, but all in all it was such a fresh breeze that I simply didn't care.
This is the best fun I've had this year sitting through half an hour of comedy and that deserves a 10.