I'm in the tiny apartment that I currently live in.
I feel afraid, but I don't know why.
I go to open the shades leading out to the balcony, and I see a zombie on it.
It's my cousin, and her eyes are rolled back in her head, and her head is just rolling about.
She has a natural tan, because she's korean, but she's so pale it scares me.
I pull the shades closed again, because I can't bear to look at her.
But then I tell my parents not to go outside because of what's going on. I also pull my brothers away from the sliding glass door (that leads out to the balcony).
I notice something weird about where I'm living though. It's the apartment I currently live in, but we're looking out over a lake..and in real life that's not the scenery around. The day looked cold, and you could obviously tell it was fall. The water looked like a mirror.
Then I find out the next day is Halloween.
My little brother wants to go trick-or-treating, and he says the zombies will make it more interesting.

Next thing I know, I'm on a hill out by the lake.
It's eerily quiet, and there are no zombies around.
Fear is overwhelming me.
The wind is blowing, and I can hear it whistling in my ears.
Then the fear is just too much.
I start running, as fast as I can, back to my house.
I slam the door open and nobody is there.
I see blood spatters....

And then I wake up.
I do believe I had a nightmare.

That part made me laugh.

Since you woke up frightened, yeah, I'd say it was a nightmare. Do you have any idea what you were frightened of?

No, I have no idea what even inspired the dream. 0_o
But yes, my little brother always is quite comical.