This injury is classified as a broken bone or twisted ankle. Since they landed on their nose so hard and fell down, they probably hurted their ankle, leg". A injury like this isn't a medical injury, I call it, a house injury. Since they only landed on their nose, and nosebleeds can be cured, but just because it isn't classified as a medical injury, doesn't mean you should shake it off. The leg needs rest, so get a good rest for healing your hurt leg.
I'm classifying this, because next time you experience a injury like this or your loved ones experience a injury like this, you know what to do.
Tell me if I'm wrong okay.