During lunch today my coworkers and I were discussing it because it seemed like a weird choice: nitrogen. But after reading the story, I guess I can understand

During lunch today my coworkers and I were discussing it because it seemed like a weird choice: nitrogen. But after reading the story, I guess I can understand. It's fairly innocuous, effective, and I guess, all things considered, fairly humane. The article reads to me like nobody involved understands that we're bathed in nitrogen all the time. I get O2 sensors, but going on about it possibly leaking around the mask, and signing a waiver, and pooling... Give anyone in the vicinity a cannula hooked to an O2 bottle and all fears solved, right? Reminds me of this time I was out with a couple friends for a beer. One asked me what "on Nitro means, is that like nitrous oxide?" I told her "I don't think so, I think it means nitrogen. You know, that stuff you're breathing?" "You mean oxygen?" "Air is mostly nitrogen, only a little oxygen." <to my other friend> "Did you know this?!?" She nods.