My reoccuring Nightmare!!

When I was 8 years old until I was 12 years old I had a reoccuring nightmare. I don't know what brought it on or why it stopped, but I'm grateful that it did stop!! It starts out at my elementary school playground. A group of my friends and I were playing on the asphalt. Out of nowhere an 18 wheeler Mac truck came speeding towards us! We started running to the building, I looked over my shoulder and saw the man driving. He had fuzzy red hair and a bushy red beard. I turned around and ran faster to the building. The next thing I know the red haired man is chasing me in a wheelchair! The weird thing is that he is going faster in the wheelchair than when he was driving the truck. I find myself running alone trying to catch up to my friends who are now driving a gold station wagon. The back window was down and I jumped in the back of the car. When I jumped in the red haired man grabbed my ankle and tried to pull me into the wheelchair with him. When I felt him pulling me backwards i stretched my body into the front seat to push the button to make the window go up. SO there I was with my foot being held by the scary man and trying to push the button with my left hand stretched all the way to the front seat. At this point my dream flashes to another place (ya know how dreams are strange that way) I end up in a big brown house being led by the red haired man, only now his hair and beard look more brown than red. I feel like I'm drugged. All the walls are painted a pale green color with fingerpaintings and watercolored pictures hanging on the walls, like a parent would show off their kids school pictures. As he led me through the hall (which seemed to go on forever) I noticed girls sitting in corners or in tiny rooms off the hallway staring into space, like they had also been drugged. I got the feeling that I was not as bad off as they were, but would soon end up that way if I didn't get out of there. At this point I got really scared and took off running down the hall. The man chased me on foot up a series of stairs into a big open room that looked like an attic that was redone into a gigantic bedroom. Off the the right there was a big window that opened up like french doors but there was not a balcony to step onto. I headed for the windows and two girls pulled the doors open and I jumped out and grabbed the rain gutter. The moment I grabbed the gutter the man jumped out after me, at the exact second he was flying through the window the two girls slammed the doors shut on his neck. The impact of the doors broke the man's neck and practically sliced his head off. I could feel his blood flowing over me and I started screaming. This is the point where I always woke up. Like I said, I don't know why I started having this dream or why it suddenly stopped. I can't remember anything tramatic happening in my life that may have caused it. If anyone can give me any ideas as to what this means let me know!!Thanks for reading:-)