Trinamool Congress MP and quizmaster Derek O’Brien is the party’s undeclared spokesperson on Twitter, the micro-blogging platform. So, some were curious why the Trinamool’s social Dada was not around when party chief Mamata Banerjee, or Didi, almost brought the United Progressive Alliance to its knees by pulling out of the coalition. When questioned by a proactive Twitter member, O’Brien said: “Working on a personal assignment... Back to the action in a few days.” Maybe, as Didi promised, after jumma prayers on Friday?