Suden Impact is a 1983 crime thriller and the 4th film in the Dirty Harry series, directed by and starring Clint Eastwood. The movie is probably best remembered for Harry's catch phrase "Go ahead, make my day.", often incorrectly attributed to the original movie in the franchise. In 2005, it was voted in a poll by the American Film Institute as the sixth most memorable line in cinema history. Along with Magnum Force, it is widely considered to be the dirtiest and most violent film of the series.