Corpse Girl knocking someone out with a shotgun

He heard her footsteps and started to look back over his shoulder, but he was way too relaxed. She just walked up and hit him in the back of the head with the butt of the shotgun. Both hands, jerked it forward, hit him right in his mess of dreadlocks. His body spasmed, his own weapon slipped from his fingers, and then he crumbled.

Excerpt From Ex-Isle, pg 487
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017