Strange Falling Sensation

[mrpropel]

I wanted to know if this has happened to anyone else before. Has anyone else ever waken up suddenly to a falling sensation and a strong muscle twitch just after you have fallen asleep? It happens to me sometimes and I never bothered to care enough to look into it until now. Apparently it's called a Hypnic jerk,

So I wonder, has this happened to anyone else and if so how often does it happen for you?

Thanks!