The first time I remember Dean putting his hands on Jeff in said manner was when he was trying to explain teacher/student relationships with Jeff and Slater.

I increasingly get the feeling that Dan Harmon's acknowledgement was spot on, in the first season finale, when Abed tells Troy that moving in together would be the moment when Community "jumped the shark." Half of this episode was about as good as Community can be(which is insanely good), and the other half was about…