When I was about 9 or 10, I had a severe head cold and a pretty high fever, so my dad put me to bed early. That night at about midnight, I woke up and had to go to the bathroom, but being so tired and weak, as I was trying to pull myself up and out of the bed, I fell "asleep". I don't know if this was a dream, a hallucination, a paranormal attack, or an out-of-body-experience, but as soon as I closed my eyes, I had two viewpoints of myself.
One, I could see myself from the ceiling. I could see myself laying on my bed, blankets pulled off, the flashing lights from my TV, everything. Then I was also in my body, but I was completely numb. I couldn't move my body at all; I could only move my lips. Every time I'd try to scream, nothing came out and from my body it felt as if I were in slow motion. Then to make matters worse, there was an invisible energy lying behind me, putting its legs and arms on me, trying to kiss me, just smothering me. I was so scared and freaked out. I didn't know what to do, then as quickly as it came, it left and I woke up.
When I told my dad of the dream, he told me it was a hallucination brought on by my high fever. My mom, however, told me she had experienced the same thing once when she was little and as it turns out my grandpa has also experienced a similar encounter when he had gotten very ill as a young boy.
I don't know what to call my experience, but it felt so real, like there was really someone behind me. As I recall, I can still imagine the dent in my mattress where the energy lay in my "dream"...
I've also had many lucids dreams. However, some of these dreams felt to real to be a dream. I often float/levitate in these "dreams". In fact, I am merely an observer in some cases watching as events unfold. Then, there are other cases where I'm floating around places that I've never been. I'm thinking these might be OOBE's as well, but I cannot say for sure. That's why I recently bought a book on the topic.