hollywood montage wipe

Visible on screen as a bar travelling across the frame pushing one shot off and pulling the next shot into place. Rarely used in contemporary film.
180 rule

The 180° rule is a basic guideline that states that two characters in the same scene should always have the same left/right relationship to each other. If the camera passes over the imaginary axis connecting the two subjects, it is called crossing the line. The new shot, from the opposite side, is known as a reverse angle.