Currently, in the Book I am helping write, the main character (I will address him as "N,") has his arm broken... with a wrench. It's broken from the elbow. I need help knowing the level of pain, symptoms and overall reaction and severity of the situation. This is vital in the plot later because, well, he gets it cut off. Trading his arm for power, this event becomes significant to the entire book and books to come! Without it, many changes wouldn't come later. So what I'm trying to say is...I don't want to mess it up or put incorrect information.
I suppose this is a bit more research than character development. And in that box you can find this: https://www.writingforums.org/threads/broken-arm.162295/