
In the blink of an eye
Visual Imagery
The phrase creates a mental picture of something happening as fast as an eye blinking.

He was here, and then in the blink of an eye, he was gone.
Figurative Use
It's often used metaphorically to express a very brief period of time.

The seasons change in the blink of an eye.
Usually Sudden
It implies that the change or event was unexpected or unanticipated.

The peaceful protest turned violent in the blink of an eye.
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