The Driver’s arm after Cerberus was damaged

His forearm sagged across the top. The loose skin sunk down and formed a shallow trench from the inside of his elbow to his wrist. There were a few long scabs at either end of the gouge. Two or three of them were going to leave scars.
“Did it bleed a lot?”
Cesar nodded. “Not, like, tons, but enough to freak everybody out when I got out of Cerbe—out of the battlesuit.
…
“Near as she can tell, I ripped out one of my arm bones. The radials.”
“Radius.”
“Yeah, that one. And some tendons, maybe. They won’t be sure what until I get it X-rayed, maybe CAT-scanned.”
“But you’re okay?”
“Feels a little weird, but yeah.” His hand flopped back and forth. Palm up, palm down. Palm up, palm down. The valley of flesh rippled, filled in, and then sunk back into his arm. “Think it gets me out of any heavy work for a while.”

Excerpt From Ex-Isle, pg 651-652
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017