she probably would've been fine if the back of her head hadn't been kicked into the pavement
99% of "instant knockout" videos are of people hitting the back of their head in one way or another
protect the back of your head, everyone
it's not worth getting into a fight with some random retard, even if you think you could win, if it's on pavement. all it takes is getting knocked off balance once
this is why a lot of decent martial arts teach breakfalls very early on
