lol. In the final of Bĺstad 2011 he did almost the same thing and also got a umpire warning. Think he doesn't like losing!
But to me class is useless. It's a sport about winning. No freaking apologies, excuses, hugs on court. Keep that to the lockerroom or romantic vacations Nadal/Monaco style. On court it's a duel to the death. Play fair but sucking up to the other player or the crowd is just lame. A player like Berdych got way more integrity than most tennis players because he doesn't care to be "liked"
That's actually way cooler and more interesting. Being dull and lame just to not offend anyone or anything isn't good for tennis or the entertainment.