Cut to a character's reaction following an action or dialogue, typically shot in medium close-up to extreme close-up.
Technical Details
The reaction cut is usually shot in medium close-up to extreme close-up framing to precisely capture facial expressions. The camera is often set to a focal length of 85-135mm for a 35mm format to ensure natural proportions. Three main variants exist: the direct reaction cut (immediately following), the delayed (after 2-5 seconds), and the anticipatory (before the triggering action). The editing rhythm typically follows a 2:1 pattern – two seconds of action, one second of reaction.
History & Development
D.W. Griffith systematically used reaction cuts for emotional emphasis for the first time in "The Birth of a Nation" in 1915. In 1925, Sergei Eisenstein developed the theoretical foundation of dialectical montage through action-reaction chains with "Battleship Potemkin." Hollywood studios standardized the technique in the classic continuity system starting in 1930. François Truffaut revolutionized the spontaneous reaction cut with handheld camera use in "The 400 Blows" in 1959. Digital editing systems have enabled more precise frame-level timing control since 1995.
Practical Application in Film
A classic application can be found in Sergio Leone's "Once Upon a Time in the West" (1968) – the 12-minute opening sequence consists of 60% reaction cuts to ambient sounds. In dialogue scenes, the standard shot/reverse-shot pattern is used with inserted reactions from the non-speaking character. Horror films utilize the "startle cut" – a reaction cut after a shock moment, lasting 0.5-1 second. Comedy genres rely on "double takes" – a second reaction from the same person in an identical shot.
Comparison & Alternatives
The insert shot shows details rather than emotions, while the cutaway distracts from the main action. The master shot technique completely foregoes reaction cuts in favor of choreographed camera movements. Split-screen techniques show action and reaction simultaneously in a divided frame. Modern Steadicam operation replaces static reaction cuts with fluid camera pans between actors. The choice depends on the desired rhythm: reaction cuts accelerate the editing pace to 15-25 cuts per minute, whereas long takes remain under 5 cuts.