It happened so suddenly, and quietly, but it happened all the same: the students who had been hanging out in the Ravenclaw boys' dorms suddenly found themselves pushed out of their dorms, shoved out of their beds, rolled out of their common room, and generally ejected from their House's private area.

An unseen force repelled all Ravenclaw students from the Common Room and attached areas and locked all entrances and exits to the rooms. The Common Room was officially locked and sealed.