Why you sometimes feel like you are falling while falling asleep

According to a study published on PMC, the sudden jolt some people experience as they drift off to sleep is known as a “hypnic jerk” — an abrupt, involuntary muscle contraction that occurs during the transition from wakefulness to sleep. Up to 70% of adults may experience it at some point, while the sensation can be accompanied by a sudden burst of autonomic activity, with some people describing it as feeling like a shock or as though they are falling | Times of India