I get this sometimes. I'm almost asleep and I then my body jerks really hard. It is kind of like a big spasm. It only happens once and then I go to sleep. I've done this since I was a child. It does not happen a lot though and only once when it does happen. I never worry worry about it. Just another weird thing happening to me.
Fibromyalgia, arthritis in spine and hips, IBS, Raynaud's syndrome, hypertension
On the eighth day God created Golden Retrievers.