Running out a non-striker when he is backing up too far is a legalised form of dismissal.
Steyn joins the list of people who believe the bowler's act here is against the spirit of the game despite it being part of the legalised forms of dismissals.
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"This shit’s getting outa hand," the right-arm fast bowler replied to a tweet from journalist Piers Morgan where Morgan called Ahmad upholding the law of the game "pathetic".
The law on Mankad-ing, as accepted by the game's highest governing body ICC, states: "If the non-striker is out of his ground from the moment the ball comes into play, to the instant when the bowler would normally have been expected to release the ball, the bowler is permitted to attempt to run him out."
The word "Mankading" is borne out of the first such famous instance of a bowler running out the non-striker for backing up too far. It was India great Vinood Mankad who ran out Bill Brown at the non-striker’s end before delivering the ball on the historic 1948 tour to Australia.
The ICC had thorough discussions on the matter before formalising this way of dismissal. However, whether it goes well with the spirit of the game, continues to be a topic of debates as we've had over the social media.