Well, in some fanfictions, she could get injured while experimenting with new magic. She's always so eager to learn, right? So perhaps she tries a spell that's a bit too advanced for her, and it backfires, causing her harm. Or it could be during a Quidditch match. She might be on the ground, watching, and a stray bludger could come flying at her, causing an injury.
One possible scenario could be during a battle at Hogwarts. Maybe the Death Eaters target her specifically, and she gets hit by a dark curse while trying to protect her friends. Another could be in an accident in the Forbidden Forest. She might be exploring and stumble upon some dangerous magical creatures, like a centaur gone wild, and get injured in the encounter.
In the 'tmnt leo gets injured fanfiction', one possible scenario could be that Leo gets injured during a fight with the Foot Clan. Maybe he underestimates their new weaponry and gets a deep cut on his arm. Another could be that he's injured while trying to protect his brothers from a falling building, getting his leg trapped under rubble.
One possible scenario could be Danny getting injured during a fight with a powerful ghost. Maybe he underestimated the ghost's new power and got hit by a strong energy blast that left him with a serious injury.
Another scenario could be in a mission gone wrong. The fanfiction might depict a mission where Naruto and his team are caught off - guard by an ambush. There could be a large number of well - coordinated enemies, and Naruto might end up being the main target, getting severely injured as he tries to fight them off and protect his team.
Perhaps Ginny gets injured in a fight against some dark wizards. Her family and friends are distraught and they all try to contribute in her recovery. Some might use magic to heal her physical wounds while others try to keep her spirits up. Or, she could get injured during a magical experiment gone wrong in Hogwarts. Her classmates then come together to figure out how to reverse the effects of the accident that caused her injury.
In 'naruto gets angry fanfiction', one possible scenario could be that Naruto gets angry when he discovers someone has been mistreating his friends in the village. He might immediately confront the wrongdoer with his signature rasengan at the ready.
Maybe he gets mad when his friends are in danger. For example, if Videl is threatened by a powerful villain, Gohan's protective nature kicks in and he gets really mad.
One possible scenario could be Meredith getting hurt during a surgical procedure. Maybe there's a complication, like a sudden bleed or an equipment malfunction. Another could be she gets into an accident outside the hospital, like a car crash on her way home. And it could also be that she gets hurt in an act of self - sacrifice to save a patient or a colleague.
Well, in 'naruto gets stabbed fanfiction', it could be that Naruto is exploring a new and dangerous area where he encounters a powerful and hostile ninja. In the heat of the fight, this ninja manages to land a stabbing blow. It might also be that Naruto is weakened due to some prior injury or chakra depletion, making him more vulnerable to being stabbed by a regular enemy. And, there could be a situation where Naruto is under the influence of some sort of genjutsu that impairs his ability to defend himself and thus gets stabbed.
Perhaps in the 'lydia gets hurt fanfiction', Lydia is hurt while exploring a dangerous and unknown place. She could step on a hidden trap, like a spike pit or a poisoned dart trap, which causes her physical harm and then she has to struggle to survive and find help in that hostile environment.
It could be that Sherlock gets shot in a setup. Someone lures him into a trap and shoots him. His survival might then depend on his knowledge of forensics and medicine. He could use the items around him at the scene of the shooting to treat his wound temporarily while waiting for help. This event might also cause a rift in his relationship with Mycroft, who might have been involved in the case in some way without Sherlock's knowledge.