I did a marathon with Rear Window
I also did it with Blink 1994, Domestic Distrubance, Disturbia, and Arlington Road and called it When One's Paranoia Becomes Real. You guys can check it out on my blog.
http://mrbrownsmoviemarathons.blogspot.com/2016/02/when-your-paranoia-becomes-real.html
I felt that these batch of movies were solid picks for this theme with the main idea being people seeing things they weren't supposed to see and their obsession of finding the truth turns into paranoia bringing suspense and terror with it. Rear Window is a great example of that with the film being well staged and acted to perfection with Jimmy Stewart. This was the film that showed Hitchcocks full potential of doing thrillers and suspense before Psycho and The Birds.