My mother-in-law does this (asks questions throughout the movie). It's unbearable.
Even worse, when you turn to something in the middle with one of those people.
"Why is so-and-so doing what-and-what?"
"I dunno, bitch, we both started watching at the same time!"
BTW, I didn't realize Wendy Carlos scored The Shining too. I've only seen The Shining once but I remember certain 'sounds' as the soundtrack, it was eerie and effective I thought, although absolutely hauntingly silent in a lot of parts. Great movie, I can't wait to watch it in HD, maybe this weekend.