Fox is currently running a contest where Simpsons fans can create their own promo for the upcoming Halloween episode with a little editor tool. There’s a contest involved (the winning promo will actually air on Fox), but I thought it was interesting enough as a stand-alone to fool around with even without entering the contest- as there are a number of clips from the episode itself.
This is my contest entry- I went for a more promo-type approach, focusing on the Homer-the-Blob story.