watching a movie and being able to pick up all of its references is another. No, I did not know much about what you said about Forrest Gump, and I've watched it a couple of times. I know Forrest, and the famous chocolate quote, and running where his leg braces come off, and I know the reference to AIDS, and that guy that ended up in a wheel chair but i can't remember his name. But that is the extent of my memory of the movie. We remember the gist of things, but not verbatim. If we don't take notice, or don't care to notice, the memory of it fades as quickly as it was registered.
It's sad, but i live on Music row here in Nashville, and I see billboards and flyers and benches proclaiming one #1 song of some artist or another, and in fact, I see it everyday walking my dog. but, if you asked me about so and so, unless it was a sign about Taylor Swift, or Carrie Underwood, I would not know, even if I see their names/song everyday for the past month.