If I wanted to write the Most Depressing Fic in the World, I could write a story where septicemia leads to amputation...but really, there is not enough comfort in the world to make up for the hurt part of that.

Head wounds, now. Head wounds are always fun! Right now I'm working on the line with amnesia, bruises, etc. so head wounds would pretty clearly fit.

Also, I'm pretty sure the Stockholm syndrome prompt was made for Sutcliff.