let's for a moment consider that this was NOT a case of sleep paralysis.
Some people believe that the aliens have planted some of their DNA in the human population and abduct their "test" subjects to harvest the DNA.
Here is a quiz to see if you are starseed or a starperson. http://home.earthlink.net/~pleiadesx/starquiz.htm
If you get a high score on this, you could be having abduction experiences...However, I think there is a bias towards western "white" people in the quiz. The "aliens" have been extremely active in africa and south america.
Are the aliens good or bad? I think that if they are causing this kind of level of anxiety in people then they can't be good. However, how much anxiety do wild life biologists cause in the animals they trap and tag? Wildlife biologists are good, love animals and probably are their number one advocates! This is a tough question!