unrehearsed action
Definitions
An act performed spontaneously without prior practice or preparation.
A behavior or event that occurs naturally and is not scripted or staged.
Examples
The actor's unrehearsed action during the live performance caught the rest of the cast completely off guard.
Her unrehearsed action of jumping into the fountain was a spontaneous response to the sudden heatwave.
Synonyms
spontaneous act impromptu performance extemporaneous deed unplanned maneuver improvised action
Antonyms
rehearsed performance scripted action planned maneuver choreographed routine prepared act