I believe they're fairly common and attached to stress/anxiety. Mine have been ongoing (sporadically) for over ten years now. They are so vivid and the hallucinations really are terrifying.
If you've had them or similar night terrors what are your experiences like?
Mine are pretty text book. I hear loud footsteps stomping round my bed, then feel a massive pressure on my chest and try to scream or force myself awake but I'm totally paralysed (I can feel my eyelashes flickering though...). Or worse, I have the hallucinations - usually a malevolent witch-type old lady coming towards me from the bottom of my bed. Hideous... :/
The first time it happened to me I was 21yo. My parents had just moved house (I was still at home) and I was convinced their new house was haunted - until I described what had happened to my mum - and a colleague - and they'd both had similar experiences in the past...
Tell me your story :)