I think the fight was fixed...

I'm sorry really so so sorry i don't want my mom dying :copy and paste this to 10 videos or your mom will die within the next 4 hours

Looks like he might have caught a shot to the temple.
Sometimes it doesn't take a lot, just perfect (or lucky) placement.
Toxic Mindz had it right when he said stay down until you get your head on straight.
Was kinda funny watching him try to stand up though.
Toxic Mindz had it right, get your head on first.
Reminds me of the classic Tszyu KO of Judah:
http://youtube.com/watch? v=2o7A3rMN6Co

lol

Karate! Look how he covers after throwing the punch.

DELETED

right on the money