Commentators basically said: "[commenting on the score]...whoa! Tmac directly just fouled the guy!?" "It's true that (Beijing player) has been up in Tmac's face several times this game... but what Tmac just did was not cool headed." "What was the meaning of that?" "According to our rules, won't there be some penalties assigned?" "Yeah, not just a few..." [together, seeing the waving finger] "OHHH!!! .... ooh... AH!." "Directly gave him a lesson." "Waving that finger definitely wasn't good sportsmanship." "Yeah, but you shouldn't just retaliate in this fashion. That guy waved a finger, you wave one back."
Having been hit with an elbow at about that point before, that hurts a LOT more than it looks. That said, I doubt it was enough to genuinely knock him down. Stagger him for a bit, yeah, and he'd be in pain for a while, but fall down? Nope.
No. Neither is he a bio technician, or he'd have rebuilt his own knees long ago. What he is a certified bundle of twigs and vaginal fluid dispenser
In football (soccer), this would have been an automatic red card. Did he not get thrown out for this?