Star Wars A New Hope has stuck with me my whole life.
But in terms of how a film that blew my mind when I saw it in the cinema, Schindlers List. The whole audience left without saying a word. It never had the same affect when I saw it on the TV at home some years later.
I watched that Schindlers list the first time when I was in secondary school. We watched it for history in one sitting and for a class that was usually difficult to control at times for the teacher, everybody sat captivated for the full film. I remember girls in the class were crying and we were silent at the end too.
When I went to watch the film ‘Senna’ I had a similar experience to yours with Schindlers List. Most in the audience were probably F1 fans and it was silent leaving the theatre.