October 16: A Film With Amazing Practical Effects
Another option: An American Werewolf in London
I'm a huge Hellraiser fan! With its strange storyline and wholly unique vision of Hell, it rates up there in my top ten favorite horror films. One of my favorite moments from any horror film ever, by far, is when resident evil dude Frank amasses enough blood to rebuild himself into human form. It's a thing of terror and beauty, and a testament to what can be accomplished with lots of talent, teamwork, and creativity.
An American Werewolf in London centers around two young American men backpacking through Europe who are attacked by a large wolf one night. The film has a fantastic transformation scene that's worth the price of admission alone.