Greatest Individual "Treehouse of Horror" Segment?

Each year, The Simpsons (1989) runs a special Halloween episode called "Treehouse of Horror." Each episode consists of three individual segments telling a different spooky story, often times a parody of a Hollywood movie. Since the show is now in its 29th season, that means there are more than 80 segments (there was no ToH in the first season).

While everyone has their personal favorites, the number of options in a poll is limited, so this list was made by general consensus from the web and suggestions from the poll board members. Which of these ToH segments do you consider the greatest?

Discuss the list here