Ok, as the name of the topic suggests I had an experience that really freaked me out

I tried a WILD about three days back and was able to get myself into the dream world with no problems. I appeared in my grandmother's living room, only, as it is only logical in the dream world, it was changed. At first everything was kind of clear and I was able to see ok. I wondered around for a while and was kind of bummed because it was a bit too dark. I shouted "TURN ON LIGHTS!!!" with no result. Then I shouted "SUPER LUCIDITY" and tried the lights command again with no result(After watching Waking Life a yesterday I understand why). I then thought about taking a flight, but since it was nighttime in the dream, I decided not to. It was then that I tried spinning in order to change my location to a brighter one in which I could do more.

Instead of changing locations I was at the same place but the dream started to fade. I was able to maintain the dreamstate, only it was almost pitch black now. I wasn't able to make out much and started to try and guide myself with my hands. That is when it happened:

I walked into the darkness and, while feeling with my right hand, I found some sort of evil presence, whose head leaned against my palm. I say it was a presense because I felt a inmense negative energy coming from this dark being that I knew it was not human, and I was more afraid than I have ever been while lucid. He/It started to push me back at the hand with his head and I, completely drenched in a unnatural and irrational fright, started shouting "I WANT TO WAKE UP!!!!!". At first I was unable to, for I seemed to be focusing on a couch covered with a sheet with my left eye, which kept me immersed in the dream world. I then closed my eyes and wished to wake up again with all of my will power and was finally able to.

Does anyone here have any clue what it might have been, besides a trick my unconscious played on me???

P.S. Lucius, I now understand exactly what you meant about not being able to just stay in the dream and fight something, and instead just forcing yourself awake. It felt too intense and the fear too great to to anything else but escape...(Also, you being well versed on the astral plane and all might have an interesting insight as to what it was too...)