I've only had severe SP once (though I do occasionally get the sensation of something sitting on my legs), and if the old hag ends up being like this SP every time, I look forward to it. I woke up and couldn't move, but I knew about SP so I wasn't scared. I did have the feeling of something sitting on me, then I see this black lab jump off me and run across the room. The walls then lit up with psychedelic colors and I look up to see my very hot co-worker standing over me topless. I ask her why she's there and she responds "Because I love you!" And then I fell back asleep into a dream of the predictably horny variety.