Why Hypnic Jerks Startle You Awake: Causes, Tips, and Facts About Sleep Jolts
Experiencing a sudden jerk just as you're drifting off to sleep, often described as a "freefall" sensation, is known as...
involuntary muscle spasms
Experiencing a sudden jerk just as you're drifting off to sleep, often described as a "freefall" sensation, is known as...