When I was much younger, this was the scariest movie I ever saw. It literally frightened the wits out of me. Don't go see stuff like this anymore today, but back then it took me weeks to get over it.
I keep losing the YouTube video I put up, so instead, I'll just link to it. Kurt Russell was the best part. I liked him for decades, after seeing him prevail over The Thing in this movie.
Evidently, a new version comes out in 2008. No thanks, once was enough for me.