i dreamed of zombies

Im a second year nursing student and I'm studying in a university with hospital. A university with hospital especially if that university has medical students, a gross anatomy room is present. That gross anatomy room can be a shortcut passage if you are late.
One night, i dreamed of something. All the second year nursing students are on the fourth floor, including myself. I was strolling around the corridor when one of my classmates shouted that the zombies are rushing on the fourth floor. I was shocked so that i told them to get their firearms and ready for defense. I also told them to lock the fire exit so that they cannot enter easily. We are ready for defense, those zombies cannot also enter the fourth floor so they use the fifth floor to enter. They crashed the fifth storey's floor so that the ceiling of the fourth floor opened and so they did enter. I don't have any firearms because the school don't have much. They tried to protect me and fired those zombies away. But there are many of them! The students cannot accomodate many enemies so I tried to provoke the zombies and ran. I was in the middle of the corridor so that my only chance to run is to jump out of the window. So I did. The zombies also did for them to catch me. Our school has a parking lot in front of the building, but in my dream it became a swimming pool. I saw a hut and I ran to it. The enemies were following me. I used the lightning power to destroy them ( I am making a manga story where my friends has the power of lightning and I have the power of wind) but I couldn't use the power that is not mine. So I use my own. I summoned the wind to make a tornado and make the zombies stay inside the swimming pool so that they would become wet. Then they stayed and couldn't get out of the tornado. I switched the electricity going in the pool, because in my dream, the pool couldn't be used by people because the electricity can kill us especially when in water. I was shocked when I saw the zombies died in electricity. haha! So that I won!
But even if I won, I wonder why did I dream of zombies...