A transition. Imagine setting a camera down to film a person. You record him for five minutes. But as it turns out, you have only a one minute time limit on your project. You have no special editing tools, just a couple of VCR's. But you realize that most of the important stuff is said in a few short moments. If you cut out the unimportant parts and edit together the parts you want based on a single camera angle, you will have what are called jump cuts. Transitions from one moment to the next within a scene that appear jarring because they break the direct flow of filmic time and space. This transition is usually used to show a very brief ellipsis of time. A good example of Jump Cuts can be seen in the movie Elizabeth when the queen practices her speech. The jump cuts make us disoriented and nervous along with the queen, giving us the tension and humor of the situation as if it were an out-take reel. Bad examples of Jump Cuts would be in B-movies like Mothra where they don't have the money to get scenes from various angles, so they cut from one important moment to the next from the same angle.