I can describe this movie a pointless slideshow with messy sound exploiting mass shootings theme. The movie is trying to be realistic and naturally paced but its sound design is anything but realistic. It is somehow inverted, highlighting ambient background for now particular reason except being disturbing and serve to jump scare viewers.
The worst of all that this movie will only be shown during film festivals meaning that it will be watched by viewers who actually love and cinematography. I strongly recommend to skip this work of art and rent Gus Van Sant's Elephant instead.