Continuity editing is a film term that implies that a series of shots should be physically continuous. It has become known as the popular ‘classic Hollywood’ style of editing. This style is used to create a sense of normality within films and let the audience make sense of the visuals. Some of the key influential films in the early 1920’s used these effects like in The Great Train Robbery, which introduced cross cutting, an editing method that is used to show what occurs in two different places at the same time. Some other examples of continuity editing techniques are the 180 degree rule, establishing shot and shot reverse shot, these are used as a way of advancing narrative.