Due to an injury, Aizawa got whilst patrolling. He had to change yo the training method, so he brought the class to a "Quad" that U.A. had built. The "Quad" was a small 30×30 meter square with many different obstacles such as walls, a jungle gym on steroids, and some other things. Aizawa: "Problem children. We will split into teams of two, and we'll play Quirktag. Basically, tag but using quirks."