If you’ve had a falling sensation before going to sleep or noticed your entire body twitch before sleeping, you’re not alone. This is a common occurrence and it’s been estimated that 70% of the population may experience it in some form or another. This phenomenon of involuntary muscle movement while sleeping is called sleep myoclonus (also called hypnic myoclonus) and happens during sleep transitions as you shift from one sleep phase into another. The specific muscle movements that occur as a re