In cricket, a batter who knows he has hit the ball and been caught may walk, leaving the field without waiting for the umpire’s decision. The custom is often described as part of an unwritten code.
In the 2013 Ashes Test at Trent Bridge, England’s Stuart Broad was caught but did not walk, and the umpire, Aleem Dar, missed the dismissal. The writer Simon Rae found that walking was “only a vogue in English cricket” for about two decades after the Second World War.