Caroline was being stubborn about doing something totally minor that I can't remember now. Something like picking up her toys or retrieving a water bottle from the floor. She stood cross-armed while I gradually went from a polite request to reminding her that it wasn't a choice and that she needed to do it.
She turned her back to me and said, "I can't. I mean it. I am not able to."
"You're not able to???"
She stomped and hollered, "My skeleton will not work, and I am just not able to!"