Rushing a shooter
Someone on FB posted that we should all resolve to "rush" a shooter if we ever find ourselves in a situation like the one in the Colorado theater. I said that if I found myself in such a situation, I'd worry about my obligations to my family first. I wouldn't put my life at significant risk to save a bunch of strangers in a movie theater if there were otherwise a decent chance I'd get out alive. Of course, were I there with my family, it would be a different story. Also, on a plane would also be different, if there were any reason to think the person was some sort of extremist and I was likely to die anyway, the rational thing to do would be to attack the hijacker. (that's not to claim that it's what I'd do, I might be too scared nonetheless, but it's reasonable and advised in such a situation.)