Perhaps it's a new character who has a grudge against the dojo in general. They target Jack because he is one of the most prominent students. This new character could be someone who was rejected from the dojo in the past and is now seeking revenge.
Well, one possibility could be that during a karate tournament, Kim gets hurt while facing a tough opponent. Jack, being her friend and teammate, blames himself for not being able to protect her better. He then decides to train extra hard to avenge her loss and also to make sure she can recover safely. This could lead to a series of events where Jack discovers new techniques and also learns more about his own limits and strengths.
He probably gets really protective. Jack might immediately rush to her side and check on her injuries. He'd be worried sick and would want to make sure she gets proper medical attention right away.
Maybe Jack gets hurt while trying to protect someone in the dojo. This could lead to a story where he has to deal with his injury while also facing the person or situation that caused the danger in the first place. His sensei could play an important role in guiding him through this difficult time.
One common theme could be friendship. When Jack is hurt, his friends might come to his rescue or support him through the recovery. Another theme could be self - discovery. His injury could lead him to learn more about his own strength and weaknesses.
In this fanfiction scenario, if Kim gets hurt, perhaps her friends in the dojo would rally around her. They might take her to the hospital or a local healer in their 'Kickin It' world. Jack would likely be especially worried and try to find out who was responsible for her injury.
Well, finding 'kickin it jack hurt fanfiction' might be a bit of a hunt. You could also check out relevant fan communities on social media platforms. Sometimes fans will share their own works or recommend good ones they've read. But be aware that the quality can vary a great deal from one story to another.
Maybe Jack is seriously injured after being hit. His friends in the dojo might then rally around him, trying to cheer him up during his recovery. They could also start an investigation to find out who was responsible for the accident.
His friends from the dojo like Milton, Jerry, and Kim could be main characters. They would be the ones to support Jack after the accident and might be involved in any investigations or helping with his recovery.