school shooting in san diego... what would you do? could you be the hero?

as i sit here and listen to the stories from these men who tackled and detained the school shooter, i ask myself could or would i do the same?  i have done some things in the past that my husband says is going to get me killed ...  a woman was obviously being abused by presumably her boyfriend or husband and i stopped and got between them and got her in my car and took her to her mothers...  i also took another abused woman to her place to get her stuff while her bf was passed out in the other room.  i feel like i would definitely step up and do my best to stop a shooter, even if i am unarmed at my own personal risk.  i think the first reaction is to preserve life, even a strangers life because that would be a gut reaction, i dont think i would hesitate at all. but its easy to think that; we've all seen video of those that do nothing, that dont want to get involved, that think its none of their business.   i grew up in chicago and we were physically abused, our neighbors knew it for years and did/said nothing.  when i went back as an adult and spoke to them about it, they admitted they knew, but didnt want to get involved.  these people were our good/close friends, yet they said/did nothing.  i think thats when i made the decision that i would not sit back and ignore what i think/thought is obviously wrong.  what do you think?