What Scary Movie Can You Not Watch Alone? [SURVEY]

Hey you tried.  But you couldn't quite make it through without cowering on the couch with someone!

What scary movie can you absolutely positively NOT WATCH ALONE?

The Shining?  The Night Of The Living Dead?  Texas Chainsaw Massacre?

I remember watching Poltergeist when it first came out and needing someone close by to get to the end.

Was it Carrie?  Rosemary's Baby?  The  Exorcist? The Blair Witch Project?