Jaws may seem like a "B" movie now, but boy when we all went to see at the theater at the time it came out...it was state of the art! We jumped out of our seats quite a few times. Gals and guys alike.
Same goes for "Carrie" a couple of years later.
And, don't even get me started on the "Exorcist". I wasn't the same for weeks. And we were in our late teens then.