
See stars
Physical Cause
Usually used when a physical blow to the head causes one to visualize flashes or spots.

She fell off the bike and saw stars.
Not Literal
It's a figurative way to describe seeing lights from a hit, not actual stars in the sky.

When the ball hit his head, he 'saw stars' for a moment.
Temporary Effect
Emphasizes a brief, momentary sensation rather than a lasting condition.

After bumping into the door, he briefly saw stars.
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