What are The MUST WATCH Halloween Movies?

It is peak time to start carving pumpkins. But, what are some of the best movies to watch while your prepping for the holiday? Much like when I decorate the Christmas tree, I like to throw on a classic Christmas movie to watch. That usually ends up being Christmas Vacation. So what do you think is a must watch Halloween movie? Keep in mind I will be in the presence of children, so I guess "Hellraiser" is out.

I have heard that "Hocus Pocus" is one of the most popular movies to watch while you decorate. I have also considered movies like "A Nightmare Before Christmas," "Scary Movie," and even the classic "Killer Klowns From Outer space."