South park

You were at school, suddenly, a group of zombies bursts in and starts attacking! You manage to enter a room and close the door, but when you look up you see your classmates, Heidi, Cartman, Kyle, Craig, Tweek, Wendy, Bebe, Tolkien, Jimmy, Clyde, Tricia, Karen, Kenny, Stan, Butters and Nichole.

"Huh? What the hell? Who are you?! Cartman shouted, very surprised while pointing at you.