[Arya's not quite as brutal a teacher as the Waif, she still has some humanity left. So she doesn't take this opportunity to continue to trash Rei with her staff. No, instead she walks over to it and kicks it up to catch in her free hand and then pass it back.] Anticipate your enemies attack. Watch the placement of their feet, the tension in their muscles. Figure out what they mean to do before they do it and you can use it against them.