Jenos's Garden of Dreams

This dream happened a few months ago, but I wanted to write it down because it's my most vividly remembered dream so far. And also quite interesting.

Non-lucid: Don't ask me how i know it was Italy, I just knew. I am sitting in a car in an alleyway. It's really bright out, in fact, there are no shadows at all. The car takes off full speed, the person in front driving through what looks like a market-place. The local DC's are getting angry with the reckless driving, but most ignore it. Next thing I know I'm standing in the center of town with a good friend of mine. We seen a man on a horse with a sword and bolt. The man on the horse, who's wearing black robes and whose face I don't remember (I think he was a representation of "The man in black" from Stephen Kings "The Dark Tower" which I am currently reading), hacks at my friends head. She's dead, I begin to run over to her, but then turn and run the other way as I realize the the man is now coming after me. Sure enough, I'm stabbed right in the back of the head. I fall stomach to the ground, and this is where the dream get's weird.
I start rising out of my body, spiraling upwards as the man rides away. Now I'm in some giant, blueish cube. Before I go any further, I'd like to point out that I am an atheist. In this cube, there are many floating, clear platforms with people climbing up them, some sort of "stairway to heaven" I guess. I huge man, and I mean absolutely massive, speaks to me. My best guess is that he was a representation of God, because I constantly find myself questioning my own beliefs. He tells me that I can either go back to earth and spend eternity as a spirit there, or I can spend eternity in the cube. I choose Earth because, hey, at least there's things to watch there. The dream ends immediately after I choose earth, and I wake up.