Jump cut

A jump cut is a cut in film editing in which two sequential shots of the same subject are taken from camera positions that vary only slightly if at all. This type of edit gives the effect of jumping forwards in time. It is a manipulation of temporal space using the duration of a single shot, and fracturing the duration to move the audience ahead. This kind of cut abruptly communicates the passing of time as opposed to the more seamless dissolve heavily used in films predating Jean-Luc Godard's Breathless, when jump cuts were first used extensively. For this reason, jump cuts, while not seen as inherently bad, are considered a violation of classical continuity editing, which aims to give the appearance of continuous time and space in the story-world by de-emphasizing editing. Jump cuts, in contrast, draw attention to the constructed nature of the film.

Continuity editing uses a guideline called the "30 degree rule" to avoid jump cuts. The 30 degree rule advises that for consecutive shots to appear "seamless," the camera position must vary at least 30 degrees from its previous position. Some schools would call for a change in framing as well (e.g., from a medium shot to a close up). Generally, if the camera position changes less than 30 degrees, the difference between the two shots will not be substantial enough, and the viewer will experience the edit as a jump in the position of the subject that is jarring, and draws attention to itself. Although jump cuts can be created through the editing together of two shots filmed non-continuously (spatial jump cuts), they can also be created by removing a middle section of one continuously filmed shot (temporal jump cuts).

Jump cuts can add a sense of speed to the sequence of events.

Georges Méliès is known as the father of the jump cut as a result of having discovered it accidentally, and then using it to simulate magical tricks; however, he tried to make the cut appear seamless to complement his illusions. Dziga Vertof's avant-garde Russian film Man With a Movie Camera (1929) is almost entirely composed of jump cuts. Contemporary use of the jump cut stems from its appearance in the work of Jean-Luc Godard (at the suggestion of Jean-Pierre Melville) and other filmmakers of the French New Wave of the late 1950s and 1960s. In Godard's ground-breaking Breathless (1960), for example, he cut together shots of Jean Seberg riding in a convertible (see image) in such a way that the discontinuity between shots is emphasized and its jarring effect deliberate. In the screen shots to the right, the first image comes from the very end of one shot and the second is the very beginning of the next shot — thus emphasizing the gap in action between the two (when Seberg picked up the mirror). Recently the jump cut has been used in films like Snatch, by Guy Ritchie, and Run Lola Run, by Tom Tykwer. It is frequently used in TV editing, in documentaries produced by Discovery Channel and National Geographic Channel (NatGeo), for example. It is noticeable in Universal Monsters films and music videos.

...
Wikipedia