I have no problems with knowing what happens in movies I haven't watched yet, so sometimes friends will describe their favourite movie scenes to me before I've seen them. Then when I do watch the show, I'll do a double-take as the movie progresses and I realise that I've reached their favourite scene. At this point, I'll actually analyse why this scene will appeal to the friend, rather than see this scene in the context of the movie. Very unnerving but it works for me.