I had my first nightmare when I was 4, and I can still remember it. Thinking about it now, it was really cool, I guess I thought it was scary when I was little.
So it starts out, I'm on an elevated, rocky area overlooking a small parking lot in which looks like Mars. I have binoculars, and a man the age of 20 has a sniper rifle. Our job was to watch over the lot, which had about 4 tricked out buses in it. All of a sudden a jet-black bus drives into the lot with a big fire monster thing on top of it, and the fire monster starts throwing fireballs all over the place. Alarms start blaring, and the buses open up on the sides and people start spewing out. I run into one to make sure nobodys in there. Turns out the inside of the bus was a Chuck-E-Cheese. Seeing that nobody is inside, I run back outside and see the fire monster throwing fire all over the place. I wake up screaming my 4-year-old head off. XD