The line was popularised by Clint Eastwood as Inspector Harry Callahan in Sudden Impact in 1983, the fourth Dirty Harry film. Written as a calm dare to a robber holding a hostage, it became Eastwood's signature catchphrase and entered wider American speech after President Ronald Reagan used it in 1985 while threatening to veto a tax increase. The American Film Institute later ranked it sixth on its list of great movie quotes. Online, the short isolated clip survives because the wording is instantly recognisable even without the scene around it.