If you can take him out before he kills more people, and you trust your shooting skills, and you are certain of who the perp is, you have to have the courage to do it. Yell “GET DOWN” and then plug him.
After you shoot him, scream “I shot the gun man”, toss your gun away from your body and lay down on the ground. Pray that you won’t get shot or blamed for the crime of the perp (like Sarah Palin who was not even there!).
You really don’t have much choice but to take him out fast if you can and IF YOU ARE ABLE. If you leave him to murder a bunch of innocent people, you get to live in your own hellish prison of guilt.
If you are not a good shot, then you might kill innocent people while trying to kill him. In that case, you can not do anything assuming he is beyond your reach, except get out of the line of fire and take the deer stuck in the headlights others with you.
“After you shoot him, scream “I shot the gun man”, toss your gun away from your body and lay down on the ground. Pray that you won’t get shot or blamed for the crime of the perp (like Sarah Palin who was not even there!).”
Then his buddy i.d.’s you, and the fact that you are defenseless...
Maybe you could yell “It’s Bush’s fault” (I thought he meant the GOA when he talked about an ownership society) then he’ll think you’re one of them.