Simply put, J cut is a technique that brings audio from next scene clip to the previous scene clip during a scenes transition. J cut can be used to foretelling something big is about to happen or bring emotion of next scene clip to previous scene clip for smoother transition. Why this technique is called J cut is because when the things for presenting the picture and the things for presenting the sound are placed on the video editing tool, they look like a capital J. Quick look at 2 common uses of J cut. It can be used in: • Dialogue scenes. • Opening of a film. Now watch a J cut DEMO clip in the video, it's the girl and boy talking clip from 00:45 to 00:53. I also put a practical J cut application example - the SPIDER-MAN: ACROSS THE SPIDER-VERSE movie official trailer at the bottom for you, feel free to watch it. Finally, J cut is usually used in any movies, especially in dialog scenes. If you want to make a smooth transition and bring the emotion of next scene clip to previous scene clip, use J cut. A practical J cut application example: Spider-Man movie trailer.