He is better than you. lol
I think he may have meant it as he saw it and does not remember it enough to talk about it. He is over it. You should let it go. You probably know the movie better than he does since it is top of mind for you. He might think lower of you and was not want to make it seem like you know more than he does, so he will not engage you when he is at a disadvantage.
The fact that it happened "again" and how you feel about it means to me that you are insecure. Lighten up, Francis.