The Christmas holiday ended, and Hogwarts Castle, already lively to begin with, grew even livelier with all the students' return.
After a Christmas holiday of special training, on the first day of the second half of the academic year, Fred and George showed an extraordinary way of going downstairs in front of a crowd of students.
They ignored the Moving Staircase as it began to rotate and connect to another platform, casting invisible Obstacle Curses and hopping down the stairs as cheerfully as if they were playing hopscotch.
This unique way of going downstairs, unconstrained by the Moving Staircase, was naturally very popular with the Gryffindor students.
It was just that the vast majority of students who had mastered the Obstacle Curse had no way of doing it like Fred and George, jumping all the way down to the first floor with such ease and ignoring the Moving Staircase entirely.
The actual situation for these students was more or less the same: just looking down from the platform made them dizzy, let alone casting an Obstacle Curse and then having to step steadily onto an invisible obstacle.
Even when they started trying from lower floors, accidents still happened very easily.
Not only did they risk falling and injuring themselves, they might even crash into passing students and drag those students into the Hospital Wing along with them.
Fortunately, breaking a leg, or even breaking bones elsewhere in the body, and even having the bones directly removed, was not a major problem for a Wizard. A little Skele-Gro would basically solve it.
However, going to the Hospital Wing and growing bones both took time, and wasting that time before class also caused quite a few Gryffindor students to be late.
Being late often meant losing points, not to mention that the