ok this is kinda hard to explain however im hopin someone else will understand and hopefully know the reason for this strange phenomena that i have frequently experienced....

ok so im lying in bed drifting off to sleep but as soon as i have fallen asleep i instantly feel as if i have 'fallen' back into my bed feeling as if my body has then bounced onto it and am obviously then awake...

if anyone can help explain the reason for this or know what it is called it would be greatly appreciated