The girls' staircase is under a spell so that if a boy sets foot on it and persists for a few steps, a wailing klaxon go通向女生宿舍的楼梯是施了魔咒的，一旦有男生踏上去，没走两步就会响起一种类似于哀鸣的报警声，同时楼梯就会暂时变成一道石头滑梯，把他和在上面的所有人都滑到楼梯下面。