always controversial movies like mixed reviews either love hate it everyone like movie shows perspective killers something personally feel something important consider may hate them may claim understand feel though relate regardless movie make think school shootings different perspectivebr br the movie shot entirely using handheld camera something think works quite well makes realistic told completely killers point view missions family outings leading big day zero day planning massacre school zero day offer answers merely presents glimpse lives two troubled young boys lets audience decide themselves feelings towards boys something mixed sympathy hatred yet left confused two ordinary young boys would thing shown surprisingly normal typical teenage boys leading ordinary lives know planning expect thing they make clear throughout whole movie noone else knows planbr br the acting extremely good considering two actors complete unknowns hope see work future despite fictionalized movie one cannot help notice obvious similarities columbine calvin andre scarily similar eric harris dylan klebold not much looks manner someone researched columbine extensively could see similarities almost certainly based it br br the actual massacre shown surveillance cameras school one chilling things ever seen completely shock seeing it feeling stays around while realistic welldone difficult watchbr br all zero day excellent movie think everyone least check out past always simply branded killers psychopaths assumed either biologically wired disaster media influence zero day shows sometimes motives deeper that never truly understand tragedies school shootings happen seen perspective killers