Nice, SAR. Good story.
I don't know about the what's it going to take, but I play the "what if?" game kind of regularly. "What's it going to take?" is kind of a natural progression from that. For example, one that I've played in my head during various points at college is "What if we had an active shooter on campus, in this building?" "What's it going to take to try and get everyone out of the school and away from the shooter?"
And yes, I know the official position is to stay in the classroom and lock the door, but since each classroom has windows by the door, I don't really think this is a safe option.
Last night, as I was running in a local park, I asked myself "What if there were some bad guys out here wanting to rob people, and they picked me?" "What's it going to take to convince them I'm not worth the effort, or get away?" Especially important since I was almost in the middle of my five mile run, and running out of gas.
Sometimes I do look around and ask myself what it would take to subdue someone, but if anyone became violent enough to require my intervention, there are usually plenty of chairs and other improvised weapons around, especially my schoolbooks.
OTOH, especially at campus, I haven't seen to many people who I think would really cause a lot of trouble for one or two people to subdue. But, we never know what may flip a person's switch so that they're now fighting with their lizard brain, instead of the primate brain.
Kent