After a - correctly spotted - foul, he managed to book the wrong man. He stood there for what seemed ages, with a yellow card in his hand, leaving everybody in suspense. And eventually showed it to a player who had had nothing to do with the affair.
Klose made a professional, theatrical dive and the referee punished him for this 'schwalbe' with a red card (second yellow). A decison that was applauded by the entire crowd, except for the Bremen coach, who was seen fulminating at the refereee. This man should know better and should be angry with Klose only.