If Anderson didn't make that dick move of throwing a flying knee when a guys mouth piece is out. It wasn't illegal and Bisping definitely should have been paying more attention, but it's still a total dick move from Anderson which isn't surprising with his short grabbing, greasing and PED using history.
If you take away that knee, Bisping gets the third having already outstruck him for the 4 minutes and 55 seconds before it was thrown. I also think you'd see a different 5th round without so much blood dripping in to Bisping's eyes.
Dick move Anderson, dick move. You got what you deserved there.