"I've got news for you, copper. I'm not human. My kind wears the human form as a glamour, to enable us to function in your society. My boss, though, is a different story. While he can, if he chooses, assume human form, he prefers the appearance of horns, tail, and cloven hooves. He's aware of what's happening between you and me. He's not happy. If you want to avoid a hellish confrontation, you'd best let me go. Fire and brimstone can be really messy."