Board Thread:General Discussion/@comment-1928908-20141208153148/@comment-25892460-20150411225811

Came up with another one:

Garage Sale: While getting things together for a garage sale at the park, Mordecai and Rigby's memories are triggered when they see various items. While this sounds like a typical clip show, the clips (and items) would be from 'episodes' that we never saw.