It’s true – it does
A recent Internet clip https://www.youtube.com/watch?v=fs_kdGe8Ljc showed what was supposed to be a random attack on a subway somewhere that looks a lot like China or Japan. Two men get onto the subway, involved in some sort of disagreement, one pushes on the shoulder of the other who applies a swift wrist lock, throwing him to the floor, then acts like he’s about to help the attacker up, then the clips ends.
Firstly, it may or may not be a real clip. There’s something about the whole confrontation, and the technique used that looks a bit staged. The technique is too clean, the attacker looks like he’s acting, etc. It could all be being played out for the camera, to make it look real, or not.
Either way, there’s something you can learn from this – mainly that the defender has no idea what to do with a person on the floor that he’s just put there. Standing back to let them get up is a really bad idea. Think about it – you’ve just hurt them, humiliated them by throwing them on the floor and now you’re going to let them get up? Odds are that you’re really going to be in trouble now, because they’re really mad.
It’s a tactical error to let them get up, but one that probably happens because the defender is afraid of going to the ground. 6 months work in some sort of grappling art would sort this right out. I’d say restrain the person on the floor until you can safely get away, or they have stopped being a threat, or law enforcement arrives. Anything else is a big risk.
But why not just kick them in the head, you might ask? Well, in a court of law I think you might end up in trouble for doing that. Laws vary between countries, but I think it’s safe to say that your level of response has to be appropriate to the level of aggression.
So, yes, it’s probably a good idea to incorporate what to do to a downed opponent into your martial art studies.