I remember the first time I saw the film "The Wall." I rented it from the video store, not sure what to expect, and my life became forever changed.
I was a teenager, with an appreciation of Pink Floyd but after watching the film, I immediately went out and purchased a copy on VHS and have been obsessed with the band ever since.
However, it probably took dozens of times watching the film to fully understand all that is going on there; the plot, subplots, etc.
Anyway, now you can save hours upon hours of your life repeatedly watching the film to "get it," as there is a website that has fully analyzed the story. Check it out here