This is a dream that I had when I was child that I can still remember...

In wake life I was taking an afternoon nap in my bedroom.
This room had no windows and the ceiling slanted all the way to the floor.
There were two single beds with a gap two feet wide between them. 
Other than the bed there was a chest of drawers. 
That is all. 
I was well on my way to sleep when the door to my room opened letting in a stream of light in the otherwise pitch black room. 
My sister appeared. 
It is at this stage that it becomes unclear to me whether I am asleep or awake. 
My sister stands in the doorway and looks at me she lifts her hands and curls her fingers into claws and makes a monster scratching gesture with a mean gnarly face showing her teeth as though she were a vampire or a werewolf or otherworldly demon. 
She made the noise of an angry cat. 
She gave me a very uneasy feeling, as you can imagine. 
The room fell dark again. 
My sister was now gone. 
I could see a luminescent green cloud in the room. 
I could feel this cloud. 
The same uneasy unsafe feeling that came from seeing my sister in her demon state intensified in the presence of this green cloud.
I was laying on my back observing the entity.
I could feel it as well as see it. 
The cloud hovered over me. 
Looking straight up at it, it descended upon me and pressed down on me pinning me heavily onto the bed.  
It held me there for a good long while. 
I couldn't move. 
I was powerless against it.  
This green force picked me up out of my bed and moved me between the gaps between the beds. 
My whole body was tingling from head to toe as I was suspended there. 
I was electrified. 
Then it dropped me. 
I woke up on the floor between the beds, my body tingling from head to toe.