Zombies?

I've been lazy and haven't written down any dreams for over a month, but I've had tons of them anyway + sleep paralysis.
Tonight I dreamt that I was first playing a game I know and there was unusually many enemies and I had to throw many grenades and hide behind walls etc. It was in a building with white walls, kind of Star-Wars like building style and it was in the bottom floor. In the end there was nowhere to hide, all of this without any fear, and then I noticed some people didn't even take damage. They turned out to look like zombies of some kind. They went around and converted people to zombies just by holding them and such. I ran around avoiding some of them for a while but they were everywhere. Around here the transition had gone from ingame to real life. So I could only think of one thing to do, and I started pretending I was a zombie too. It worked, they lost interest in me and I walked around doing stupid faces and throwing my arms around, still not walking into them. It seemed that the whole school was taking place in this event, and many of them were zombies. Eventually we got upstairs, and the people who weren't zombies had set up some high poles on the floor which they stood on, and where the zombies couldn't get up. I don't remember much more until we stood in lines, and suddenly we were playing a ball game. All the zombies had been locked into another room. Yeah...!