Cairax turning back into Regenerator, Stealth kicking skull

I believe the demon has been killed or banished.”
“And the … the other guy?”
The bones of the arms and legs looked shorter. The teeth in the skull were still long, but not the tusks they’d been just a few minutes earlier. The horns were little more than lumps across the frontal and parietal bones. It might’ve been a trick of the dim light from the moon. Or maybe some aspect of the possession wearing off.
Stealth shook her head. “We do not know the upper limit of his healing ability. He may, in fact, be dead. It is also possible he will be fine by morning.”
“Wow,” said Madelyn. “Is that … that’s good, right?”
Stealth’s boot lashed out and caught the skull right at the base. It snapped off the spine and spun twice on the ground, away from the pile of bones. Her foot whipped forward again and sent the skull sailing down past the intersection of La Brea and 3rd. It hit the pavement with a loud crack almost twenty yards away, right at the entrance to a furniture store parking lot, and skittered south even farther. It settled in the gutter in front of a ransacked yogurt shop.
“Just to be safe.”

Excerpt From Ex-Communication, pg 584-585
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546