what be most disturb about this film be not that school kill spree like the one depict actually happen and but that the truth be they be carry out by teenager like cal and andre . normal kid with normal family . by use a hand hold camera technique a la blair witch and ben coccio succeed in bring u into the life of two friend who have some issue with high school and although we aren not ever tell exactly what be behind those issue . they seem to be typical a lot of people hate high school and so what . a part of you just doesn not believe they will ever carry out the very well think out massacre on zero day . the surveillance camera scene in the school during the shooting be make all the more powerful for that reason . you can not believe it really happen and and that it really happen . the hand hold camera technique also create the illusion that this be not a scripted movie and a brilliant idea give the subject matter .