There are many modes of dismissals in cricket which might be called controversial, to say the least, and Mankad is one such mode of dismissal. Mankading a batsman out involves the bowler dislodging the bails at the bowling end and running the non-striker out before bowling the ball.

The dismissal is named after Indian all-rounder Vinoo Mankad who ran out Australia's Bill Brown in 1947 after he'd had backed up too far at the non-striker's end. Those against Mankading argue its unsportsmanlike given victims often leave their crease unwittingly, rather than in a bid to gain a run-scoring edge. Some say the non-striker should at least be warned before it’s attempted.

A generous bowler may warn a batsman to stay in his crease rather than to take his wicket, but this is not required by the Laws of the game nor the MCC guidance notes on the Spirit of Cricket.

Something similar was seen in the Rajasthan Royals and Kings XI Punjab match in IPL 2019 when R Ashwin ran Jos Buttler out during his bowling stride. The matter was referred to the third umpire and after replays, Buttler was given out.

The controversy here was Ashwin had not given any warning to Buttler for leaving his crease and Buttler who was looking dangerous with 69 off 43 balls with 2 sixes and 10 fours, was forced to go back to the pavilion, which he did, albeit being very furious.

Here is the video of the controversial moment: