Hogwarts afterlife

You slowly sat up, looking around the quiet room. You eased out of the bed, creeping to the door, almost scared to open it. Suddenly, there came a voice from behind you. Fred: go ahead, open it! You wheeled around, bewildered. But there he was, standing with that stupid smirk on his face. But he wasn't the only one. There was Cedric, and Sirius Black, and your old professor, Remus. There were a bunch of other people, some that you recognized, some that you didn't. But- weren't they dead??