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Why You Jerk Awake..
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967 观看6543stickverse_barz原视频发布: 2026-05-20

A hypnic jerk is a sudden muscle twitch or body jerk that occurs during sleep transition, caused by the brain misinterpreting muscle relaxation as falling and triggering an emergency panic response that jerks the body awake; this phenomenon is nearly universal and experienced by almost everyone.

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