Heh, like I said, as an adult less visceral than as a kid, but still get shivers from the "redrum" scene - and of course Jack Nicholson's line - "Here's Johnny!"
I later learned that line was actually one of the most famous ad lib lines in the history of cinema! Didn't know that wasn't part of the original script!
The scene in The Shining that scared me, was when the wife reads the paper in the typewriter, seeing it is the same thing repeated over and over, she shifts through the reams of paper composing the rest of the story he was writing, only to discover they all had the same thing! It was at that point you know... that she knows... her husband is demented, and that she is screwed.