Fellaini was pretty foolish to have a go twice in 30 seconds, but some of that blame has to go on the ref. The ref let foul after foul go for far too long. Waiting until the 84th minute to start booking players is insane, especially in a derby. Then Aguero comes fishing for a reaction. When you put your face to within 6-8 inches of another person's face, you can usually expect one of two things, a kiss, or a reaction to get you out of their face. Getting up in another player's face should be as cardable of an offense as it is when they do it do a ref. It certainly goes against the sportsmanship of the game.