I was trying to find a specific fic. Kurt saves Rachel's life in what they think is an accident and then it turns out that Vocal Adrenaline is trying to kill them. Pretty sure it had a happy ending.
Also, any stories where Kurt is streong and confident Esp where he takes over glee club from Rachel or refuses to let her or Mr Schue walk all over him.
Specific Fic Found! Very quickly, too. Link in comments. Thank you very, very much. I love this site!