I've seen Richard Browning fly this in person — he did a demo a couple of years ago at San Diego Comic-Con. It's unreal to watch, but it's definitely something I can see not being all that widespread: it takes a lot of training to acclimate to it.

Browning's been doing a bunch of demos lately: it feels like they're trying to figure out the best use, whether that's military applications, rescue, or others. This isn't the first rescue demo, although this one looks like it's a bit more useful than the other one (which was disaster response, and which very much looked like a publicity stunt.)