An injury

Sara sat up and groaned. She couldn't really remember what had happened, just that she blanked out, and now she was here. Speaking of which... Where was she? She hadn't been there before, and it didn't look like a classroom or dorm. But, then again, she did have a massive pain in the back of her head. What had she been doing? Getting into trouble, no doubt. For a Hufflepuff, Sara always got in trouble more than anyone else. It wasn't that surprising. She was a troublemaker everywhere she went. She was okay with that. But what had she been doing today? Sara couldn't remember, and instead glanced around the room. She could make out beds, a few covered with curtains. Was this the hospital wing? Sara had never been there. She tried to keep her troublemaking a secret. But someone would find out eventually, and it could have been the Headmaster or a student who wouldn't care. But either way, it was important to keep it a secret. If anyone found out... She would be in massive trouble.
"Hello? Is anyone here?" Sara called out. It looked empty, but appearances could be deceiving. She glanced around. No one. Perhaps they'd come soon.