From a Facebook post by some random friend:
Dear paranoid people who check behind their shower curtains for murderers: if you do find one, what’s your plan?
From the Wikipedia page for the Fort Hood shooting:
Army Reserve Captain John Gaffaney attempted to stop Hasan by charging him, but was mortally wounded before he could reach him. Civilian physician assistant Michael Cahill also tried to charge Hasan with a chair, but was shot and killed. Army Reserve Specialist Logan Burnette tried to stop Hasan by throwing a folding table at him, but he was shot in the left hip, fell down, and crawled to a nearby cubicle.
You fight with whatever you have available.
Rory Miller, Meditations on Violence (p. 83):
Do not curl up and die because that’s what you’ve seen on TV. . . A criminal in Baton Rouge took ten .357 bullets to the head and chest, including a contact shot to the center of the chest. . . Even after that last shot, where the officer stated he looked into the hole he blew into the man’s skull, the threat still managed to start to attack again. BE THAT DEDICATED.
You keep fighting. Maybe you die–but maybe you were going to die anyway.
Subsequent analysis of the flight recorders recovered from the crash site revealed how the actions taken by the passengers prevented the aircraft from reaching the hijackers’ intended target. Of the four aircraft hijacked on September 11 – the others were American Airlines Flight 11, American Airlines Flight 77 and United Airlines Flight 175 – United Airlines Flight 93 was the only one that failed to reach its hijackers’ intended target.
You can never know what you would really do. But I was struck by the reactions of the victims from the interviews I heard on the radio today: take cover, play dead, get down, get away, get out. Our society trains us to duck and cover, to escape, to wait for someone to save us–and if that’s the best option, take it. But it’s not the only option, and shouldn’t be the first option.
When stress hits, when the battle starts, you do not rise to the occasion–you fall to the level of your training. If you do not train your spirit to fight, you are training it to not fight–to freeze, to panic, to wait for someone to save you. The police will do their damnedest when they arrive, but they’re not magic. They don’t have a superpower that you don’t–just the obligation to intervene, some training in the use of force, and weapons. But they do not have a monopoly on any of these things.
You have the right to defend your life. You have the right to fight back. You have the duty to fight back with whatever means and tools the Creator has provided. Maybe it will be utterly futile and you’ll die anyway, when perhaps you might have lived otherwise. But maybe not.
Some people don’t have the capacity for violence under any circumstances; it can’t be trained into them. Those people should run, play dead, do what they can. I don’t begrudge it to them. But if you can, you owe it to yourself to decide in advance what you will do when it’s needed. It is your obligation to yourself, the people who love you, and the society that bore you. How can you shirk it?
I don’t judge the victims nor the survivors. The fault lies solely with the predator now in custody. But “it wasn’t your fault” is cold comfort for mourning.
Miller again, p. 136 (emphasis added):
If you are ever faced with extreme violence, you will have to make the decision to act. Make it now. You must decide what is worth fighting for, never forgetting that the question involves the risk of both dying and killing. You must decide now.