It's Friday, and I feel the need to take a break from the political and drift toward the superficial. Hence, this thread.
What movie have you watched that was shite-in-your-pants scary? So many of today's horror and sci-fi movies depend on startling the viewer and providing seriously gory special effects. Being startled is different from being scared. Being grossed out is different from being scared.
My pick? John Carpenter's version of The Thing. First movie I ever saw that had a hopelessly apocalyptic ending.