Charles B. Pierce with Eastwood, who liked the story and helped Pierce develop it into "Sudden Impact" (1983), the fourth entry in Eastwood's Dirty Harry film series. Pierce was given a writer's credit for the story along with Joseph C. Stinson. Pierce is said to have written the phrase, "Go ahead, make my day," the film's most famous line, which went on to be identified as one of the ten best movie quotes of all-time by the American Film Institute. The phrase was inspired by something his father once told Pierce in his youth while encouraging his son to mow the lawn: "When
Go-Ahead London On 30 March 2012, Go-Ahead purchased Northumberland Park Garage from First London with all routes brought under the London General wing. On 1 April 2014, Go-Ahead restructured its Metrobus business, with the management of the Transport for London contracted services passing to the control of Go-Ahead London, with the remaining services administered by Brighton & Hove from 1 July 2014. Services are now operated under an expanded London General licence, however the Metrobus trading name is retained. London General's licence was formally increased by the Vehicle and Operator Services Agency on 25 April 2014. The current subsidiaries of Go-Ahead London