The Epic Adventures Of Emma in Her Own Mind.

I'm in a big, expensive house. There is a large grand piano at which a sad looking girl is sitting. She's about the same age as me. Somehow I know that she's lonely and sad because even though she lives in a really huge expensive house, she has no friends and her parents are really horrible to her. I'm leaning against a large window, when a car horn sounds.
"What's that?" I ask. The girl apparently doesn't hear me and says the same thing. We run down the drive an there's a car there, full of people. I'm not sure if I know I'm dreaming. We both get into the car, which is full of other kids. None of them seem to notice me. I'm squished in the corner, next to a girl with a large overbite. She smiles at me and says
"Hi, I'm the godess of the water." I'm confused at this. She laughs and says "We're going round and picking up dreamers. You can be whatever you want."
I'm thinking about this, as well as other things. I think I know I'm dreaming, but I also wonder if I'm supposed to be dead in this dream, because nobody except for this girl can see me. Whatever, I think. Then I begin to wonder if I'm actually dreaming, but I don't reality check. I decide that if I'm not dreaming, then this must be very crazy. We get to a place reminiscent of the Arts Centre and go and crouch at the windows.
"What's going on?" I whisper to the 'goddess of the water'.
"We're under attack. Dream invaders"
"Oh." I get up and start to silently dash about the place (which is a lot bigger than it is in real life). There are maze-like corridors that twist and turn and instead of stairs, the floor just slopes upward. I see some people I feel are these Dream Invaders, and take my knife out of my belt. They can't see me, so I'm sure I must be dead in this dream.

Big fat lapse in memory...

Then I find I'm in the left side of the building, a darker version of the right side. My jeans are torn, so I guess I must have had a fight with the Invaders. I creep round the back and come back to the right side. I crouch by the windows again.
"Where have you been? They're inside and you've been running about doing..." and then the dream ends.