Cerberus’ servos vs a skull

THERE WAS A clump of bone jammed in the left elbow joint. Cesar thought it might be part of a jawbone. The servos strained against it, and it limited his range of movement. He thought about folding the exoskeleton’s arm up and trying to crush it, but worried he’d blow out the motors altogether and leave himself with a crippled arm.

Excerpt From Ex-Isle, pg 585
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017