Bangkok Dangerous (1999 film)

Bangkok Dangerous Thai is a 1999 Thai crime film written and directed by the Pang Brothers. Stylishly edited, the story of a deaf and mute hitman was the debut film for the twinbrother team of filmmakers. A 2008 remake of the same name also directed by the Pangs, stars Nicolas Cage. This film was also unofficially remade as Pattiyal a 2006 Indian Tamil movie.

Kong lost his hearing when he was a child. Because of his disability, he was taunted by other children and grows up into an angry young man.At a target range, he finds he has a knack for target shooting when he visualizes the faces of the boys that taunted him in the target. His deafness gives him an edge in shooting, as he does not react to the gunshots. He eventually gets a job as a janitor at the range. ........

Source: Wikipedia