Seen it for years. My father was a freestyle martial artist before he was killed, back in the 80's before all the MMA craze and mixing of styles became popular. We were a part of a dojo that had TKD, Karate, and a myriad of other styles, but we were still kind of detached since my father was my trainer, and I was only brought into the other groups for sparring. I got my first "kudos" in the sport when one of the kids in their group mouthed off and talked trash about me, so my dad offered to let me spar the kid. Let's just say that I wasn't the one who needed the ambulance to come out and double check on a bloody nose and bruised face. I can still feel the 'moment' in my memories with the ambulance lights in the background of my father sitting next to the window of the dojo, leaning into my shoulder and saying "good job". Good feelings.
He was also undefeated as an escrima fighter. I knew a little, enough to get by effectively if that was my only defense, but he was killed before I was able to really get into it, and get older and better.
His full philosophy was that if your opponent was disabled, they couldn't fight, could they! Obviously, there was reserve within that and other things, but that was the general philosophy between us for real world protection.
That was a "one step" with that kick where he's facing the camera
Still dangerous, IMO. Deep kicks like that can cause injury to the kicker's leg, and well as leave you wide open for quite a few other retaliations by the person you are kicking. With the style that my father taught me, I always HOPED for the person to get close like that. That was glory there.