Quote Originally Posted by R3RUN
Don't really need to have aim if you shoot alot of rounds. Aim at head level, fire. Its also possible that the person was a hunter or had lots of practice with guns recreationally.
He was shooting into class rooms. Most class rooms have one door for entry/exit. Run into the room, the people ALL run to the back of the room. They are all lined up ready to be shot. It isn't hard...