Why didn't Nam Phan protect his head? Yeah, I get it. His opponent's hands were down. But all it takes is a wild haymaker, and it's him who's drooling.
Of course, we can't forget this streetin' classic:
Pssssh Id fight both of them and chain punch them into another dimension. pussys on here thinking your hard come at me bro
Still, from looking at his stance, I don't think this "street fighter" would understand defense if it hit in the head. In fact, that's exactly what happened.
But... I've seen douchebags throw wild haymakers and knock someone out. It's not that they know what they're doing, but if you put your mass into it, funny things happen. The douchebag in question has a lot of mass. I'd still want to protect my head.
As a beatdown, this was A+++, though.
A bad one, apparently.
That other guy took the beating like a champ, though.