Appearances
Harry Potter and the Prisoner of Azkaban (First mentioned)
Harry Potter and the Prisoner of Azkaban (film) (First identified as Aresto Momentum)
It looks to me like they established that there is a spell that does that, but it wasn’t named until the movie. I suppose without the name there’s no real evidence that it doesn’t just accelerate the subject in any way the caster pleases.
In any case, in the MoR verse, the brooms act in a manner that involves some sort of rest state. Also, as of Eliezer’s reply to this post, that spell canonically exists in the MoR verse.
Well, it’s the name that actually tells us it’s “arresting momentum” and not, I don’t know, stopping him getting too close to the ground or some sort of anti-gravity spell. The scene is in the book, but the spell itself is not.
(The wiki treats the films a canon when they don’t actually contradict the books, instead of a separate canon like most sane people would. They do the same for everything, in fact, from videogames to trading cards, although they draw the line at fanfiction.)
According to the wiki:
It looks to me like they established that there is a spell that does that, but it wasn’t named until the movie. I suppose without the name there’s no real evidence that it doesn’t just accelerate the subject in any way the caster pleases.
In any case, in the MoR verse, the brooms act in a manner that involves some sort of rest state. Also, as of Eliezer’s reply to this post, that spell canonically exists in the MoR verse.
Well, it’s the name that actually tells us it’s “arresting momentum” and not, I don’t know, stopping him getting too close to the ground or some sort of anti-gravity spell. The scene is in the book, but the spell itself is not.
(The wiki treats the films a canon when they don’t actually contradict the books, instead of a separate canon like most sane people would. They do the same for everything, in fact, from videogames to trading cards, although they draw the line at fanfiction.)