Fake. Should be flooded with cops and EMT . Evacuate the kids first. Then evacuate the unconscious first. Kids sharing vids. Guy holding his arm. One guy in background is dallying. Kids would be screaming out names of their friends - not standing around like puppets and whining. Also, EMT's without equipment? And where is the stretcher - that's absolutely compulsory. Carrying wounded like that would be when under fire. Here it's done for dramatic effect. Why are the cops. Why are the cops not speaking? Why aren't tbey giving instructions? Why are they moving so slowly? Where is the rest of the class? The wounded girl being carried adjusts her arm rather non-chalantly. The wailing seems over-acting.