It's madness." Under the Laws of Cricket, a batsman is considered bowled if "a bail is completely removed from the top of the stumps, or a stump is struck out of the ground". Law 29.1.2 adds ...
However, umpire Nitin Menon did not raise his finger. As replays confirmed, the ball had actually hit the top of off stump but as the bails remained undisturbed, the batter was given not out.