+1
In The Gates of Hell, also having another more well known name given...It wasn't simply the scene of the zombie at the window, but it was the fact that it was the older sister of the kiddo who saw it, along with someone saying something to the effect of 'That isn't your sister anymore'; The biblical/demonic happenings in this film drew more fear with these details, as it was then not simply a zombie. Watching 'Rec' recently didn't scare me near as much, but then again I was very young and I've seen and heard much since.
I believe my first horror, only tiny tiny, first movie memories really were of The Exorcist. Talk about fear, going behind the couch, peeking, trembling even; it even gave me problem on the shitter, I thought she was going to bite my arse off, this was tide into my fear of the deep-end in our pool, cause obviously Jaws must be there. Perhaps I was even old enough after a few years to realize how so greatly irrational it all was, it was part impulsive due to the intitual and tremendous fear of the films, and also part because I enjoyed the sensation of fear.