Ever Feel Like You’re Falling? Here’s Why.

Hinzugefügt: 2026-05-17

[00:00:00]You're just about to drift off. And suddenly, bam! Your whole body jerks you awake. It's called a hypnic jerk, and it happens when your brain gets its signals crossed. As you enter light sleep, your brain sleep system and alert system fight for control. When your muscles relax too fast, your brain mistakes it for falling, literally. Scientists believe this reflex may come from ancient ancestors trying not to fall out of trees. Stress, caffeine, and exhaustion can make these sudden jolts happen even more often. Follow Body Fact to uncover the hidden secrets inside your own body, because your brain never truly sleeps.