If mister nutso blasts into your room and starts shooting, you will more than likely have time to do one of two things: Duck and cover, hoping that you will not be one of the targets, and CHARGE! Preferably a whole bunch of you charge at the same time, throwing books, etc, at him as you do. Sure, some will be hit, but not all, and I feel that is the best way to save the most lives. Lots of people get shot every day without dieing. You will not have time to dig out ropes or guns at the bottom of book bags, call 911, or plan amongst yourselves. Things will be happening NOW, and FAST.

Chances of having half of a room full of 19 year olds charge the badguy is probably slim, but I for one would rather be shot in the face fighting than in the back hiding...