In film making, the 180-degree rule is a basic guideline regarding the on-screen spatial relationship between a character and another character or object within a scene. An imaginary line called the axis connects the characters and by keeping the camera on one side of this axis for every shot in the scene, the first character will always be frame right of the second character, who is then always frame left of the first.
shot reverse shot
a shot reverse is shot is a film technique where one character is shown looking at another character and then the other character is shown looking back at the first character. since the characters are shown facing in opposite directions, the viewer assumes they are looking at each other.
match on action
match on action us an editing technique for continuity editing in which one shot cut to another shot portraying the action of the subject in the first shot. this creates the impression of a sense of continuity the action carrying through creates a visual bridge which draws the viewers attention away from the slight cutting or continuity issues.
http://www.youtube.com/watch?v=Mv93covb53w
