I'm writing a short story that involves a character whose hands were mangled in an accident at work. It happened to him nearly thirty years ago. It needs to be an accident that doesn't involve him losing many of his fingers, one of two at the most, and he can still use his fingers but his former dexterity is gone. He used to play the guitar. I can't think of anything but vague ideas. I'd love to get some suggestions. Thank you.