The Sentinels eat sugar, stay up late, have a seizure

Sam insisted that they take cover under some ferns, giving Ghost's rump a mighty push when she fell to the forest floor – laughing, for some reason. He waited with bated breath and tense shoulders, listening as the stomping and huffing grew distant. Eventually,  the battle music faded into The Forest At Night.

Only then did he turn on Ghost, meeting her question with outrage on his voice. "Are you serio- that was obviously HER," he whispered, though it was louder than his normal voice would have been. "Wearing a skin."