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Sit/stand bolt upright

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LampPro Tip 1/3
Surprise ReactionPlay
The phrase often indicates an immediate reaction to something unexpected or startling. SlideHearing the explosion, everyone in the room stood bolt upright.
LampPro Tip 2/3
IntensityPlay
When used, it suggests a high level of intensity in the person's emotion, such as extreme alertness. SlideThe loud bang made me sit bolt upright, heart racing.
LampPro Tip 3/3
Physical ImagePlay
It creates a strong visual of a person's posture changing rapidly to a very straight, vertical position. SlideIn the presence of the general, the soldiers stood bolt upright.