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 Reaction Shot – this type of shot underscores key moments within the scene. At their most extreme, reaction shots can function as an exclamation mark; however, for the most part they enable the audience to work out what the character is thinking.

What is the purpose of a reaction shot?

Its main purpose is to show an emotional response to the immediately preceding action or words of another character in the scene, or to an event in the immediately preceding scene which may or may not involve another actor (e.g., an explosion, monster, empty room, etc.)