The phrase implies action taken under strong emotion, without much thought.

Emotionally Driven

Best used in casual settings, it might sound too informal in serious or formal contexts.

Informal Conversations

Highlights the lack of planning, use it when emphasising spontaneity.

Focuses on the immediate nature of the action, often surprising the actor too.

While sudden, such actions are not usually harmful but can be impulsive.

Useful in storytelling to describe a character's sudden, unexpected action.