It wasn't until the second time watching this episode that I noticed Dino Stamatopoulos co-wrote this one. I find little tidbits like this fascinating. This show as a whole, for me, is something more though. Not just an extremely funny show, but FULL to the brim with heart, and this episode had A LOT of that! I like how the journey was through Abed's mind via his pov... The realization of what was making Abed act so strangely was sad, but his friends gathered around him and helped him through it.
The stop motion was great, even though a couple of them were kinda scary: Britta and Jeff.
I loved that Chang was the snowman. He cracks me up no matter what he is, says, does... etc.
All in all this episode was fantastic in all it's entirety.