Just wanted to pass along another level of awareness to the jolting awake while falling asleep -- many people believe that we have many bodies:
The physical body
The astral body
The mental body
The spiritual body
When you jolt awake like that, it is because your astral body was just about to be released into the freedom of the dream world and was suddenly brought back to unite with the physical body before having it's natural adventure, hence the jolt.
I have had this kind of thing all my life. It's interesting because I always saw it as a sign of health, that hypnotic jerk, like, wow, I AM alive! lol...
However, I am dealing, AGAIN this year, with the reality of my PTSD and all my anxiety issues and adreanal issues. I see the connections now with the anxiety and trauma. I have had more episodes similar to what some have described here, feeling that TERROR and DREAD upon waking suddenly like that in the middle of the night with intense panic and intrusive nasty thoughts and racing mind.
Besides therapy, I have been meditating, taking occassional baths in strong, pleasant smelling epson salts, gardening, playing piano, relaxing with friends, staying off of Internet, and just trying to accept reality and help turn my mind into an ally -- an ally like a spiritual ninja. This is all helping.
Last night was intense thunder and lightning. As I am writing this, I remember this is a trigger for me. This forum is very helpful--will check into sleep apnea, though -- I never explored that part...
Thanks everyone -- be kind to yourselves today!