One of the first horror movies I saw as a child - it scared me to death and still does to some extent (although in some degree it's kind of funny).
Anyway, be thankful you weren't around during the Exorcist face meme days. A silent video plays titled something that you want to desperately listen to, forcing you to turn up the volume. Then, a shrill scream and face of the demented girl appears. I remember I wet myself the first time I saw that (no, not really).