“Leisurely pacing of this kind is likely to register as a form of respect for the viewer’s intelligence and observation.”
The third (and best and hardest to watch) is Let There Be Light. Made in 1946, it "follows 75 U.S. soldiers who sustained debilitating emotional trauma and depression. A series of scenes chronicle their entry into a psychiatric hospital, their treatment and eventual recovery." It's a tough and valuable film, but its subject matter is so demoralizing that was banned by the Army for some 30+ years.