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 Group Orpington services of First London were acquired. In February 2008 Go-Ahead sold Go West Midlands to Rotala's Central Connect, just two years after purchasing the company. In June 2008 the Gatwick Express rail service was incorporated into Southern. In October 2009 East Thames Buses was acquired and integrated into Go-Ahead London as well as the Horsham operations of Arriva Southern Counties that were integrated into Metrobus. In December 2009 Plymouth Citybus was purchased from Plymouth City Council. In January 2010 Go-Ahead sold most of its airport based operations to Dnata UK and Servisair. In March 2010 Konectbus in Norfolk was